Prosecution Insights
Last updated: April 19, 2026
Application No. 17/964,596

ZERO TURN RADIUS MOWER WITH REMOVABLE BATTERY PACKS

Final Rejection §103
Filed
Oct 12, 2022
Examiner
MARTINEZ, JOSE ANTONIO
Art Unit
3671
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Briggs & Stratton LLC
OA Round
2 (Final)
96%
Grant Probability
Favorable
3-4
OA Rounds
3y 2m
To Grant
99%
With Interview

Examiner Intelligence

Grants 96% — above average
96%
Career Allow Rate
23 granted / 24 resolved
+43.8% vs TC avg
Moderate +5% lift
Without
With
+5.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
18 currently pending
Career history
42
Total Applications
across all art units

Statute-Specific Performance

§103
58.8%
+18.8% vs TC avg
§102
34.6%
-5.4% vs TC avg
§112
4.6%
-35.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 24 resolved cases

Office Action

§103
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1-4, 7, 10, 12-15, 18, 20-26 are rejected under 35 U.S.C. 103 as being unpatentable over Liu et al. (US 20200315095 A1) in view of Matsuyama et al. (US 11731518 B2) and Gao et al. (US 20200267903 A1). Regarding claim 1, Liu teaches, a zero-turn radius (ZTR) mower (100), comprising: a chassis (133) having a front portion and a rear portion; (See Liu [0081]) a pair of front wheels coupled with the chassis, the pair of front wheels located at the front portion of the chassis; (See Liu [0049] and annotated Fig. 1 below) PNG media_image1.png 640 532 media_image1.png Greyscale a pair of rear wheels coupled with the chassis, the pair of rear wheels located at the rear portion of the chassis; (See Liu [0049] and annotated Fig. 1 above) a pair of wheel motors (143), wherein each wheel motor is coupled to one of the pair of rear wheels and configured to independently drive the rear wheel in a forward direction and a rearward direction; (See Liu [0090] and annotated Fig. 1 below) PNG media_image2.png 642 484 media_image2.png Greyscale a mower deck (133) supported by the chassis (13), the mower deck including a plurality of mower blades (131); and (See Liu [0087]) a battery assembly (16) located at the rear portion of the chassis, the battery assembly configured to power a drive motor, the battery assembly comprising: (See Liu [0095] and annotated Fig. 3 below) PNG media_image3.png 584 468 media_image3.png Greyscale a plurality of battery packs, each battery pack including a plurality of lithium-ion battery cells and a pack connector; and (See Liu [0004]) a receptacle (16a) defined in part by a bottom wall, the receptacle comprising a plurality of bays (162), each bay having: (See Liu [0106] and annotated Fig. 12 below) PNG media_image4.png 1062 764 media_image4.png Greyscale a receiver (162a) extending away from the bottom wall, the receiver configured to guide a respective one of the battery packs within the bay (162); (See Liu annotated Fig. 12 above) a dock (162e) configured to couple to the pack connector of the respective one of the battery packs (161); and Liu fails to disclose a handle, wherein the receptacle is angled at an acute angle relative to an operating plane so that a front end of the receptacle is arranged closer to the operating plane than a rear end of the receptacle and wherein each wheel motor is electrically coupled to the receptacle, and wherein the dock is mounted on the dividing wall. Matsuyama teaches a handle (45n). (See Matsuyama annotated Fig. 8 below) and the receptacle (45) is angled at an acute angle relative to an operating plane so that a front end of the receptacle is arranged closer to the operating plane than a rear end of the receptacle (See Matsuyama annotated Fig. 8 below) and wherein each wheel motor is electrically coupled to the receptacle. PNG media_image5.png 946 757 media_image5.png Greyscale Matsuyama states, "The electrode portion 43 is made up of a plurality of plate-like terminals connected to an electric motor 18 (refer to FIG. 1) side, and the plurality of terminals extend individually in a direction in which the battery pack 21 is installed and removed (in the front-rear direction) and are arranged side by side in the left-right direction at predetermined intervals." (See Matsuyama Col. 7, lines 42-48 and annotated Fig 8 below) Gao teaches wherein the dock is mounted on the dividing wall. (See Gao annotated Fig. 13 below) PNG media_image6.png 908 637 media_image6.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the handle and the acute angle of the operating plane in view of Matsuyama in order to help the user insert and remove battery packs with ease. Thus, making the battery containing portion ergonomical and time saving. It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the dock mounted on the dividing wall in view of Gao in order to improve accessibility and design flexibility of the battery compartment. Regarding claim 2, Liu teaches the ZTR mower of claim 1, further comprising an operator seat (12), wherein the battery assembly (16) is located rearward relative to the operator seat. (See Liu [0106]) Regarding claim 3, Liu teaches a zero-turn radius (ZTR) mower (100). Liu fails to disclose wherein the receptacle is angled 15 degrees relative to the operating plane. Matsuyama discloses wherein the receptacle is angled 15 degrees relative to the operating plane. Matsuyama states, "The battery containing portion 41 is made from a resin and is supported on the body frame 11. The upper wall 41a and the lower wall 41b of the battery containing portion 41 are inclined by angle θ1 relative to a vertical line 40 that extends vertically so that a containing portion opening 41e is situated above or at the same height as the bottom wall 41d. The angle θ1 is set to be in a range of 0<θ1≤90°." (Matsuyama Col. 5 lines 32-43) It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the 15 degree angle of the receptacle in view of Matsuyama in order to reduce wear on terminals and reduce damage on pins due to repeated insertion by sliding the battery packs in to the battery containing portion. Regarding claim 4, Liu teaches a zero-turn radius (ZTR) mower (100). Liu fails to disclose wherein the receptacle is angled between 10 and 20 degrees relative to the operating plane. Matsuyama discloses wherein the receptacle is angled between 10 and 20 degrees relative to the operating plane. Matsuyama states, "The battery containing portion 41 is made from a resin and is supported on the body frame 11. The upper wall 41a and the lower wall 41b of the battery containing portion 41 are inclined by angle θ1 relative to a vertical line 40 that extends vertically so that a containing portion opening 41e is situated above or at the same height as the bottom wall 41d. The angle θ1 is set to be in a range of 0<θ1≤90°." (Matsuyama Col. 5 lines 32-43) It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the angle between 10 and 20 on the receptacle in view of Matsuyama in order to optimize the users experience. An angle less than 10 degrees reduces the ergonomic advantage, offering minimal assistance from gravity during insertion. An angle more than 20 degrees may cause the battery to enter too aggressively, increasing the risk of damaging terminal pins and placing excessive strain on the user during installation. Regarding claim 7, Liu teaches the ZTR mower of claim 1, wherein each battery pack (161) includes a chamfered edge, and each receiver (162b) of the battery assembly (16) includes a bevel configured to engage the chamfered edge of at least one of the battery packs. (See annotated Fig. 10 and 12 below) PNG media_image7.png 952 1182 media_image7.png Greyscale PNG media_image8.png 858 616 media_image8.png Greyscale Regarding claim 10, Liu teaches the ZTR mower (100) of claim 1. Liu fails to disclose wherein the bottom wall of the receptacle is angled relative to the operating plane. Matsuyama discloses wherein the bottom wall of the receptacle is angled relative to the operating plane. Matsuyama states, "The battery containing portion 41 is made from a resin and is supported on the body frame 11. The upper wall 41a and the lower wall 41b of the battery containing portion 41 are inclined by angle θ1 relative to a vertical line 40 that extends vertically so that a containing portion opening 41e is situated above or at the same height as the bottom wall 41d. The angle θ1 is set to be in a range of 0<θ1≤90°." (Matsuyama Col. 5 lines 32-43) It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the angled bottom wall receptacle in view of Matsuyama in order to help the user insert and remove battery packs with ease. Thus, making the battery containing portion ergonomical and time saving. Regarding claim 12, The ZTR mower of claim 1, further comprising a cover (16c) rotatably coupled to the rear portion of the chassis (16b), wherein: the cover (16c) is configured to rotate between an open position and a closed position; (See Liu [0107]) the cover (16c) is configured to protect the battery pack (161) from exposure to an outside environment when the cover is in the closed position; and (See Liu [0107]) the cover (16c) is configured to provide a user with access to the plurality of battery packs (161) when in the open position. (See Liu [0107]) Regarding claim 13, Liu discloses a zero-turn radius (ZTR) mower (100), comprising: a pair of rear wheels; (See Liu [0049] and annotated Fig. 1 below) PNG media_image1.png 640 532 media_image1.png Greyscale a pair of wheel motors (143), wherein each wheel motor is coupled to one of the pair of rear wheels and configured to independently drive the rear wheel in a forward direction and a rearward direction; (See Liu [0090] and annotated Fig. 1 below) PNG media_image2.png 642 484 media_image2.png Greyscale a plurality of battery packs, each battery pack including a plurality of lithium-ion battery cells and a pack connector; and (See Liu [0004]) a receptacle (16a) defined in part by a bottom wall, the receptacle comprising a plurality of bays (162), each bay having: (See Liu [0106] and annotated Fig. 12 below) PNG media_image4.png 1062 764 media_image4.png Greyscale a receiver (162a) extending away from the bottom wall, the receiver configured to guide a respective one of the battery packs within the bay (162); (See Liu annotated Fig. 12 above) a dock (162e) configured to couple to the pack connector of the respective one of the battery packs (161); and Liu fails to disclose a handle, wherein the receptacle is angled at an acute angle relative to an operating plane so that a front end of the receptacle is arranged closer to the operating plane than a rear end of the receptacle and wherein each wheel motor is electrically coupled to the receptacle, and wherein the dock is mounted on the dividing wall. Matsuyama teaches a handle (45n). (See Matsuyama annotated Fig. 8 below) and the receptacle (45) is angled at an acute angle relative to an operating plane so that a front end of the receptacle is arranged closer to the operating plane than a rear end of the receptacle (See Matsuyama annotated Fig. 8 below) and wherein each wheel motor is electrically coupled to the receptacle. PNG media_image5.png 946 757 media_image5.png Greyscale Matsuyama states, "The electrode portion 43 is made up of a plurality of plate-like terminals connected to an electric motor 18 (refer to FIG. 1) side, and the plurality of terminals extend individually in a direction in which the battery pack 21 is installed and removed (in the front-rear direction) and are arranged side by side in the left-right direction at predetermined intervals." (See Matsuyama Col. 7, lines 42-48 and annotated Fig 8 below) Gao teaches wherein the dock is mounted on the dividing wall. (See Gao annotated Fig. 13 below) PNG media_image6.png 908 637 media_image6.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the handle and the acute angle of the operating plane in view of Matsuyama in order to help the user insert and remove battery packs with ease. Thus, making the battery containing portion ergonomical and time saving. It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the dock mounted on the dividing wall in view of Gao in order to improve accessibility and design flexibility of the battery compartment. Regarding claim 14, Liu teaches the ZTR mower (100) of claim 13. Liu fails to disclose wherein the receptacle is angled 15 degrees relative to the operating plane. Matsuyama discloses wherein the receptacle is angled 15 degrees relative to the operating plane. Matsuyama states, "The battery containing portion 41 is made from a resin and is supported on the body frame 11. The upper wall 41a and the lower wall 41b of the battery containing portion 41 are inclined by angle θ1 relative to a vertical line 40 that extends vertically so that a containing portion opening 41e is situated above or at the same height as the bottom wall 41d. The angle θ1 is set to be in a range of 0<θ1≤90°." (Matsuyama Col. 5 lines 32-43) It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the 15 degree angle of the receptacle in view of Matsuyama in order to reduce wear on terminals and reduce damage on pins due to repeated insertion by sliding the battery packs in to the battery containing portion. Regarding claim 15, Liu teaches the ZTR mower (100) of claim 13. Liu fails to disclose wherein the receptacle is angled between 10 and 20 degrees relative to the operating plane. Matsuyama discloses wherein the receptacle is angled between 10 and 20 degrees relative to the operating plane. Matsuyama states, "The battery containing portion 41 is made from a resin and is supported on the body frame 11. The upper wall 41a and the lower wall 41b of the battery containing portion 41 are inclined by angle θ1 relative to a vertical line 40 that extends vertically so that a containing portion opening 41e is situated above or at the same height as the bottom wall 41d. The angle θ1 is set to be in a range of 0<θ1≤90°." (Matsuyama Col. 5 lines 32-43) It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the angle between 10 and 20 on the receptacle in view of Matsuyama in order to optimize the users experience. An angle less than 10 degrees reduces the ergonomic advantage, offering minimal assistance from gravity during insertion. An angle more than 20 degrees may cause the battery to enter too aggressively, increasing the risk of damaging terminal pins and placing excessive strain on the user during installation. Regarding claim 18, The ZTR mower of claim 13, wherein each battery pack (162) includes a chamfered edge, and each receiver (162b) includes a bevel configured to engage the chamfered edge of at least one of the battery packs. (See annotated Fig. 10 and 12 below) PNG media_image9.png 503 624 media_image9.png Greyscale PNG media_image8.png 858 616 media_image8.png Greyscale Regarding claim 20, A zero-turn radius (ZTR) mower (100), comprising: a pair of rear wheels; (See Liu [0049] and annotated Fig. 1 below) PNG media_image1.png 640 532 media_image1.png Greyscale a pair of wheel motors (143), wherein each wheel motor is coupled to one of the pair of rear wheels and configured to independently drive the rear wheel in a forward direction and a rearward direction; and (See Liu [0090] and annotated Fig. 1 below) PNG media_image2.png 642 484 media_image2.png Greyscale a receptacle (16a) defined in part by a bottom wall, the receptacle comprising a plurality of bays (162), each bay having: (See Liu [0106] and annotated Fig. 12 below) PNG media_image10.png 648 468 media_image10.png Greyscale a receiver (162b) extending away from the bottom wall, the receiver configured to guide a battery pack within the bay; (See Liu [0107]) a dock (162e) configured to couple to the pack connector of the battery packs (161); and a dividing wall arranged on a lateral side of the receiver (162a). (See Liu annotated Fig. 12 below) PNG media_image4.png 1062 764 media_image4.png Greyscale Liu fails to disclose wherein the dock is mounted on the dividing wall and wherein the battery pack includes an upper portion and a lower portion, and a central axis extending between the upper portion and the lower portion wherein the central axis of the battery pack is angled at an acute angle relative to an operating plane, so that a front end of the receptacle is arranged closer to the operating plane than a rear end of the receptacle. Matsuyama discloses wherein the battery pack includes an upper portion and a lower portion, and a central axis extending between the upper portion and the lower portion wherein the central axis of the battery pack is angled at an acute angle relative to an operating plane (Matsuyama Col. 5 lines 32-43 and annotated Fig. 2 below), so that a front end of the receptacle (45) is arranged closer to the operating plane than a rear end of the receptacle (See Matsuyama annotated Fig. 8 below). Matsuyama states, "The battery containing portion 41 is made from a resin and is supported on the body frame 11. The upper wall 41a and the lower wall 41b of the battery containing portion 41 are inclined by angle θ1 relative to a vertical line 40 that extends vertically so that a containing portion opening 41e is situated above or at the same height as the bottom wall 41d. The angle θ1 is set to be in a range of 0<θ1≤90°." (Matsuyama Col. 5 lines 32-43 and annotated Fig. 2 below) PNG media_image11.png 880 615 media_image11.png Greyscale PNG media_image5.png 946 757 media_image5.png Greyscale Gao teaches wherein the dock is mounted on the dividing wall. (See Gao annotated Fig. 13 below) PNG media_image6.png 908 637 media_image6.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the battery packs portions, angle of the central axis, and the acute angle of the operating plane in view of Matsuyama in order to optimize the angle configuration and promote even distribution of mechanical stress across the connectors and mounting surfaces, thereby enhancing durability under operational vibration and shock conditions. Also, to help the user insert and remove battery packs with ease. Thus, making the battery containing portion ergonomical and time saving. It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the zero-turn radius (ZTR) mower as taught by Liu so as to utilize the dock mounted on the dividing wall in view of Gao in order to improve accessibility and design flexibility of the battery compartment. Regarding claim 21, Liu teaches the ZTR mower of claim 1 and each of the battery packs (161). Lui fails to teach wherein each of the battery packs defines a central axis extending between the handle and a base, and wherein the central axis is angled at an acute angle relative to the operating plane. Matsuyama teaches wherein the battery pack (21) defines a central axis extending between the handle (45n) and a base (45e), and wherein the central axis is angled at an acute angle relative to the operating plane. (See Matsuyama annotated Fig 8 below) PNG media_image12.png 946 757 media_image12.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the acute angle in view of Matsuyama in order to facilitate efficient electrical coupling and routing between the receptacle and the wheel motors. Regarding claim 22, Lui teaches the ZTR mower of claim 21. Lui fails to teach wherein the mower defines a centerline that extends longitudinally along the mower and an X-Z plane that is parallel to the centerline, and wherein the acute angle defined between the central axis and the operating plane is parallel to or within the X-Z plane. Gao teaches wherein the mower (400) defines a centerline (A-A) that extends longitudinally along the mower and an X-Z plane (See Gao annotated Fig. 40 below) that is parallel to the centerline, and wherein the angle defined between the central axis and the operating plane is parallel to or within the X-Z plane. PNG media_image13.png 775 904 media_image13.png Greyscale Matsuyama teaches the acute angle, as a receptacle (45) is angled at an acute angle. (See Matsuyama annotated Fig. 8 below) PNG media_image14.png 946 757 media_image14.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the known spatial orientation relationships in view of Gao in order to achieve a conventional geometric coordinate system used to describe mower chassis orientation, thereby enabling consistent alignment and operation of the mower's drive and cutting system. It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the acute angle in view of Matsuyama in order to facilitate efficient electrical coupling and routing between the receptacle and the wheel motors. Regarding claim 23, Liu teaches the ZTR mower of claim 13 and each of the battery packs (161). Lui fails to teach wherein each of the battery packs defines a central axis extending between the handle and a base, and wherein the central axis is angled at an acute angle relative to the operating plane. Matsuyama teaches wherein the battery pack (21) defines a central axis extending between the handle (45n) and a base (45e), and wherein the central axis is angled at an acute angle relative to the operating plane. (See Matsuyama annotated Fig 8 below) PNG media_image12.png 946 757 media_image12.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the acute angle in view of Matsuyama in order to facilitate efficient electrical coupling and routing between the receptacle and the wheel motors. Regarding claim 24, Lui teaches the ZTR mower of claim 23. Lui fails to teach wherein the mower defines a centerline that extends longitudinally along the mower and an X-Z plane that is parallel to the centerline, and wherein the acute angle defined between the central axis and the operating plane is parallel to or within the X-Z plane. Gao teaches wherein the mower (400) defines a centerline (A-A) that extends longitudinally along the mower and an X-Z plane (See Gao annotated Fig. 40 below) that is parallel to the centerline, and wherein the angle defined between the central axis and the operating plane is parallel to or within the X-Z plane. PNG media_image13.png 775 904 media_image13.png Greyscale Matsuyama teaches the acute angle, as a receptacle (45) is angled at an acute angle. (See Matsuyama annotated Fig. 8 below) PNG media_image14.png 946 757 media_image14.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the known spatial orientation relationships in view of Gao in order to achieve a conventional geometric coordinate system used to describe mower chassis orientation, thereby enabling consistent alignment and operation of the mower's drive and cutting system. It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the acute angle in view of Matsuyama in order to facilitate efficient electrical coupling and routing between the receptacle and the wheel motors. Regarding claim 25, Liu teaches the ZTR mower of claim 20. Lui fails to teach wherein the central axis of the battery pack extends between a handle and a base. Matsuyama teaches wherein the central axis of the battery pack (21) extends between a handle (45n) and a base (45e). (See Matsuyama annotated Fig 8 below) PNG media_image12.png 946 757 media_image12.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the acute angle in view of Matsuyama in order to facilitate efficient electrical coupling and routing between the receptacle and the wheel motors. Regarding claim 26, Lui teaches the ZTR mower of claim 25. Lui fails to teach wherein the mower defines a centerline that extends longitudinally along the mower and an X-Z plane that is parallel to the centerline, and wherein the acute angle defined between the central axis and the operating plane is parallel to or within the X-Z plane. Gao teaches wherein the mower (400) defines a centerline (A-A) that extends longitudinally along the mower and an X-Z plane (See Gao annotated Fig. 40 below) that is parallel to the centerline, and wherein the angle defined between the central axis and the operating plane is parallel to or within the X-Z plane. PNG media_image13.png 775 904 media_image13.png Greyscale Matsuyama teaches the acute angle, as a receptacle (45) is angled at an acute angle. (See Matsuyama annotated Fig. 8 below) PNG media_image14.png 946 757 media_image14.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the known spatial orientation relationships in view of Gao in order to achieve a conventional geometric coordinate system used to describe mower chassis orientation, thereby enabling consistent alignment and operation of the mower's drive and cutting system. It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu so as to utilize the acute angle in view of Matsuyama in order to facilitate efficient electrical coupling and routing between the receptacle and the wheel motors. Claim 5 and 16 is rejected under 35 U.S.C. 103 as being unpatentable over Liu et al. (US 20200315095 A1) in view of Matsuyama et al. (US 11731518 B2) and Gao et al. (US 20200267903 A1), as applied to claims 1-4, 7, 10, 12-15, 18, and 20-26 above, and further in view of Davey et al. (WO 2020229181 A1). Regarding claim 5 and 16, Liu, as part of the assembly taught by the combined teachings of Liu in view of Matsuyama and Gao, teaches the ZTR mower of claim 1, wherein each battery pack includes a slot (See Liu [0106]). Liu in view of Matsuyama, fails to disclose each receiver of the battery assembly is a dovetail shaped projection configured to engage the slot of one of the battery packs. Davey discloses each receiver of the battery assembly is a dovetail shaped projection configured to engage the slot of one of the battery packs. Davey states, “Preferably, each of the receiving interfaces 40, 42, 44, 46 comprises a guide mechanism known to those skilled in the art and a locking mechanism known to those skilled in the art, the locking mechanism for the accumulator 22, 24, 26, 28 configured as a storage battery pack is locked in the corresponding receiving interface 40. 42, 44, 46.” (Davey machine translation Pg. 15, lines 32-35 and annotated Fig. 3 below) PNG media_image15.png 624 658 media_image15.png Greyscale It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains, with a reasonable expectation of success, to have modified the ZTR mower as taught by Liu in view of Matsuyama, so as to utilize the locking mechanism in view of Davey in order to provide a mechanical interlocking engagement that enables secure retention, precise alignment, and resist operational vibrations. Response to Arguments Applicant’s arguments with respect to claim(s) 1, 13, and 20 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Regarding the above, the claims as amended now recite limitations in a combination that were previously unclaimed in combination with one another. However, a new reference Gao et al. (US 20200267903 A1) has been applied above, which renders obvious the claims as amended. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOSE ANTONIO MARTINEZ whose telephone number is (571)272-5896. The examiner can normally be reached M-F 7-3. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Joseph Rocca can be reached at (571) 272-8971. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. JOSE ANTONIO. MARTINEZ Examiner Art Unit 3671 /JOSEPH M ROCCA/Supervisory Patent Examiner, Art Unit 3671
Read full office action

Prosecution Timeline

Oct 12, 2022
Application Filed
Jun 23, 2025
Non-Final Rejection — §103
Sep 25, 2025
Response Filed
Nov 10, 2025
Final Rejection — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12593750
AGRICULTURAL DISC MOWER WITH KNIFE-RETAINING SPRING PLATE
2y 5m to grant Granted Apr 07, 2026
Patent 12588587
ROTATABLE RING CONTROL MECHANISM AND METHOD FOR CONTROL ARM OF WHEELED LAWN CARE MACHINE
2y 5m to grant Granted Mar 31, 2026
Patent 12588599
ELECTRIC MOWER
2y 5m to grant Granted Mar 31, 2026
Patent 12575494
CAPACITIVE PARAMETER MEASUREMENT IN A SELF-PROPELLED FORAGE HARVESTER
2y 5m to grant Granted Mar 17, 2026
Patent 12575490
AGRICULTURAL ROTARY DISC MOWER
2y 5m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

3-4
Expected OA Rounds
96%
Grant Probability
99%
With Interview (+5.3%)
3y 2m
Median Time to Grant
Moderate
PTA Risk
Based on 24 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month