Office Action Predictor
Last updated: April 17, 2026
Application No. 17/052,469

ELECTRIC MOTOR FOR A POWER TOOL

Final Rejection §103
Filed
Nov 02, 2020
Examiner
JOHNSON, ERIC
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Milwaukee Electric Tool Corporation
OA Round
4 (Final)
62%
Grant Probability
Moderate
5-6
OA Rounds
3y 0m
To Grant
84%
With Interview

Examiner Intelligence

Grants 62% of resolved cases
62%
Career Allow Rate
527 granted / 852 resolved
-6.1% vs TC avg
Strong +22% interview lift
Without
With
+22.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
32 currently pending
Career history
884
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
47.3%
+7.3% vs TC avg
§102
29.5%
-10.5% vs TC avg
§112
20.2%
-19.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 852 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 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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, 6-11 and 15-19 are rejected under 35 U.S.C. 103 as being unpatentable over Inuzuka (US20150180307, “Inuzuka”) or alternatively Inuzuka in view of Du et al. (US20040056538, “Du”). Re claim 1, Inuzuka discloses an electric motor for use with a power tool (figs 6a-c, [0056], claims 9/1 & 18/12), the electric motor comprising: a stator (claims 9/1 & 18/12); a rotor 25a (figs 6a-c, [0056]) rotatable relative to the stator (claims 9/1 & 18/12, as is known in the art rotors rotate w/ respect to stationary stators); an output shaft 51 coupled to the rotor 25a for rotation with the rotor 25a (figs 6a-c, [0056]), the output shaft 51 defining a longitudinal axis about which the rotor 25a rotates (fig 6b); a fan 57 coupled to the output shaft 51 for rotation with the output shaft 51 (figs 6a-c, [0056]); and a bushing 63 supported on the output shaft 51 (figs 6a-c, [0056]) and positioned between a face of the rotor 25a and the fan 57 (figs 6a-c, axial face of 25a). Inuzuka discloses claim 1 except for: a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan. Inuzuka in another embodiment discloses a balancing member coupled to the output shaft 51 for rotation with the rotor 25 (figs 4a-c, [0048-0049], balancing member includes 63 & 65), the balancing member substantially balancing a mass of the rotor about the longitudinal axis ([0049]); the balancing member includes a bushing 63 (figs 4a-c, [0048-0049]) positioned between a face of the rotor 25 and the fan 57 (figs 4a-c, [0048]); the bushing 63 including a balancing feature 65 formed on an outer circumference of the bushing 63 (figs 4c-b, [0049]); and the balancing member is integrally formed with a portion of the fan 57 (figs 4a-c, since rotor includes 63 & 57 shown in figs 4a-c and formed as one piece so that 63 & 57 rotate together, then the balancing member is integral with the fan as well as any portion of the fan). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the rotor of Inuzuka with a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan, as disclosed by Inuzuka in another embodiment, in order to adjust the balance of the rotor, as taught by Inuzuka ([0049]). Alternatively with respect to the limitation “the balancing member is integrally formed with a portion of the fan” (application discloses molding fan and bushing together (figs 5-6, [0021]): Re claim 1, Inuzuka discloses an electric motor for use with a power tool (figs 6a-c, [0056], claims 9/1 & 18/12), the electric motor comprising: a stator (claims 9/1 & 18/12); a rotor 25a (figs 6a-c, [0056]) rotatable relative to the stator (claims 9/1 & 18/12, as is known in the art rotors rotate w/ respect to stationary stators); an output shaft 51 coupled to the rotor 25a for rotation with the rotor 25a (figs 6a-c, [0056]), the output shaft 51 defining a longitudinal axis about which the rotor 25a rotates (fig 6b); a fan 57 coupled to the output shaft 51 for rotation with the output shaft 51 (figs 6a-c, [0056]); and a bushing 63 supported on the output shaft 51 (figs 6a-c, [0056]) and positioned between a face of the rotor 25a and the fan 57 (figs 6a-c, axial face of 25a). Inuzuka discloses claim 1 except for: a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan. Inuzuka in another embodiment discloses a balancing member coupled to the output shaft 51 for rotation with the rotor 25 (figs 4a-c, [0048-0049], balancing member includes 63 & 65), the balancing member substantially balancing a mass of the rotor about the longitudinal axis ([0049]); the balancing member includes a bushing 63 (figs 4a-c, [0048-0049]) and positioned between a face of the rotor 25 and the fan 57 (figs 4a-c, [0048]); the bushing 63 including a balancing feature 65 formed on an outer circumference of the bushing 63 (figs 4c-b, [0049]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the rotor of Inuzuka with a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan, as disclosed by Inuzuka in another embodiment, in order to adjust the balance of the rotor, as taught by Inuzuka ([0049]). Inuzuka further discloses the rotor includes molded resin 67 that is molded with the balancing member (figs 6a-c, [0056], 67 molded w/ both 63 & 64). Du discloses forming the fan 122 from molded plastic 116 of the rotor 102 (fig 5, [0079]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to form the fan of Inuzuka, from molded resin of the rotor, as disclosed by Du using molded plastic, in order to reduce the number of manufacturing steps, as taught by Du ([0079]). It is pointed out that Inuzuka in view of Du discloses the balancing member is integrally formed with a portion of the fan, since Inuzuka discloses the bushing 63 is molded with resin 67 (figs 6a-c); the another embodiment of Inuzuka discloses the balancing member includes bushing 63 (figs 4c-b); and Du teaches molding the fan 122 with the molding material of the rotor 102 (fig 5, [0079]) . Re claim 11, Inuzuka discloses a power tool (figs 6a-c, [0056], claims 9/1 & 18/12) comprising: a housing (claims 9/1 & 18/12); and an electric motor positioned within the housing (claims 9/1 & 18/12, inherent electric motor within housing as is known for power tools), the motor including a stator (claims 9/1 & 18/12); a rotor 25a (figs 6a-c, [0056]) rotatable relative to the stator (claims 9/1 & 18/12, as is known in the art rotors rotate w/ respect to stationary stators); an output shaft 51 coupled to the rotor 25a for rotation with the rotor 25a (figs 6a-c, [0056]), the output shaft 51 defining a longitudinal axis about which the rotor 25a rotates (fig 6b); a fan 57 coupled to the output shaft 51 for rotation with the output shaft 51 (figs 6a-c, [0056]); and a bushing 63 supported on the output shaft 51 (figs 6a-c, [0056]) and positioned between a face of the rotor 25a and the fan 57 (figs 6a-c, axial face of 25a). Inuzuka discloses claim 11 except for: a drive mechanism positioned within the housing; the electric motor operable to drive the drive mechanism; a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan. Inuzuka in another embodiment discloses a drive mechanism 9 positioned within the housing 2 (fig 1, [0031]-[0032]); the electric motor operable to drive the drive mechanism (fig 1, [0032]); a balancing member coupled to the output shaft 51 for rotation with the rotor 25 (figs 4a-c, [0048-0049], balancing member includes 63 & 65; note: discloses rotor 25 rotor in figs 1-2- see [0020]), the balancing member substantially balancing a mass of the rotor about the longitudinal axis ([0049]); the balancing member includes a bushing 63 (figs 4a-c, [0048-0049]) and positioned between a face of the rotor 25 and the fan 57 (figs 4a-c, [0048]); the bushing 63 including a balancing feature 65 formed on an outer circumference of the bushing 63 (figs 4c-b, [0049]); and the balancing member is integrally formed with a portion of the fan 57 (figs 4a-c, since rotor includes 63 & 57 shown in figs 4a-c and formed as one piece so that 63 & 57 rotate together, then the balancing member is integral with the fan as well as any portion of the fan). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the power tool and rotor of Inuzuka with a drive mechanism positioned within the housing; the electric motor operable to drive the drive mechanism; a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan, as disclosed by Inuzuka in another embodiment, in order to reduce the speed of the electric motor for proper output rotational speed of the power tool, as demonstrated by Inuzuka ([0032], with respect to drive mechanism); and adjust the balance of the rotor (with respect to balancing member), as taught by Inuzuka ([0049]). Alternatively with respect to the limitation “the balancing member is integrally formed with a portion of the fan” (application discloses molding fan and bushing together (figs 5-6, [0021]): Re claim 1, Inuzuka discloses an electric motor for use with a power tool (figs 6a-c, [0056], claims 9/1 & 18/12), the electric motor comprising: a stator (claims 9/1 & 18/12); a rotor 25a (figs 6a-c, [0056]) rotatable relative to the stator (claims 9/1 & 18/12, as is known in the art rotors rotate w/ respect to stationary stators); an output shaft 51 coupled to the rotor 25a for rotation with the rotor 25a (figs 6a-c, [0056]), the output shaft 51 defining a longitudinal axis about which the rotor 25a rotates (fig 6b); a fan 57 coupled to the output shaft 51 for rotation with the output shaft 51 (figs 6a-c, [0056]); and a bushing 63 supported on the output shaft 51 (figs 6a-c, [0056]) and positioned between a face of the rotor 25a and the fan 57 (figs 6a-c, axial face of 25a). Inuzuka discloses claim 1 except for: a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan. Inuzuka in another embodiment discloses a balancing member coupled to the output shaft 51 for rotation with the rotor 25 (figs 4a-c, [0048-0049], balancing member includes 63 & 65), the balancing member substantially balancing a mass of the rotor about the longitudinal axis ([0049]); the balancing member includes a bushing 63 (figs 4a-c, [0048-0049]) and positioned between a face of the rotor 25 and the fan 57 (figs 4a-c, [0048]); the bushing 63 including a balancing feature 65 formed on an outer circumference of the bushing 63 (figs 4c-b, [0049]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the rotor of Inuzuka with a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan, as disclosed by Inuzuka in another embodiment, in order to adjust the balance of the rotor, as taught by Inuzuka ([0049]). Inuzuka further discloses the rotor includes molded resin 67 that is molded with the balancing member (figs 6a-c, [0056], 67 molded w/ both 63 & 64). Du discloses forming the fan 122 from molded plastic 116 of the rotor 102 (fig 5, [0079]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to form the fan of Inuzuka, from molded resin of the rotor, as disclosed by Du using molded plastic, in order to reduce the number of manufacturing steps, as taught by Du ([0079]). It is pointed out that Inuzuka in view of Du discloses the balancing member is integrally formed with a portion of the fan, since Inuzuka discloses the bushing 63 is molded with resin 67 (figs 6a-c); the another embodiment of Inuzuka discloses the balancing member includes bushing 63 (figs 4c-b); and Du teaches molding the fan 122 with the molding material of the rotor 102 (fig 5, [0079]) . Re claim 11, Inuzuka discloses a power tool (figs 6a-c, [0056], claims 9/1 & 18/12) comprising: a housing (claims 9/1 & 18/12); and an electric motor positioned within the housing (claims 9/1 & 18/12, inherent electric motor within housing as is known for power tools), the motor including a stator (claims 9/1 & 18/12); a rotor 25a (figs 6a-c, [0056]) rotatable relative to the stator (claims 9/1 & 18/12, as is known in the art rotors rotate w/ respect to stationary stators); an output shaft 51 coupled to the rotor 25a for rotation with the rotor 25a (figs 6a-c, [0056]), the output shaft 51 defining a longitudinal axis about which the rotor 25a rotates (fig 6b); a fan 57 coupled to the output shaft 51 for rotation with the output shaft 51 (figs 6a-c, [0056]); and a bushing 63 supported on the output shaft 51 (figs 6a-c, [0056]) and positioned between a face of the rotor 25a and the fan 57 (figs 6a-c, axial face of 25a). Inuzuka discloses claim 11 except for: a drive mechanism positioned within the housing; the electric motor operable to drive the drive mechanism; a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan. Inuzuka in another embodiment discloses a drive mechanism 9 positioned within the housing 2 (fig 1, [0031]-[0032]); the electric motor operable to drive the drive mechanism (fig 1, [0032]); a balancing member coupled to the output shaft 51 for rotation with the rotor 25 (figs 4a-c, [0048-0049], balancing member includes 63 & 65), the balancing member substantially balancing a mass of the rotor about the longitudinal axis ([0049]); the balancing member includes a bushing 63 (figs 4a-c, [0048-0049]) and positioned between a face of the rotor 25 and the fan 57 (figs 4a-c, [0048]); the bushing 63 including a balancing feature 65 formed on an outer circumference of the bushing 63 (figs 4c-b, [0049]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the rotor of Inuzuka with a drive mechanism positioned within the housing; the electric motor operable to drive the drive mechanism; a balancing member coupled to the output shaft for rotation with the rotor, the balancing member substantially balancing a mass of the rotor about the longitudinal axis; the balancing member includes the bushing; the bushing including a balancing feature formed on an outer circumference of the bushing; and the balancing member is integrally formed with a portion of the fan, as disclosed by Inuzuka in another embodiment, in order to reduce the speed of the electric motor for proper output rotational speed of the power tool, as demonstrated by Inuzuka ([0032], with respect to drive mechanism); and adjust the balance of the rotor, as taught by Inuzuka ([0049]). Inuzuka further discloses the rotor includes molded resin 67 that is molded with the balancing member (figs 6a-c, [0056], 67 molded w/ both 63 & 64). Du discloses forming the fan 122 from molded plastic 116 of the rotor 102 (fig 5, [0079]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to form the fan of Inuzuka, from molded resin of the rotor, as disclosed by Du using molded plastic, in order to reduce the number of manufacturing steps, as taught by Du ([0079]). It is pointed out that Inuzuka in view of Du discloses the balancing member is integrally formed with a portion of the fan, since Inuzuka discloses the bushing 63 is molded with resin 67 (figs 6a-c); the another embodiment of Inuzuka discloses the balancing member includes bushing 63 (figs 4c-b); and Du teaches molding the fan 122 with the molding material of the rotor 102 (fig 5, [0079]) . Re claim 6, Inuzuka, or alternatively Inuzuka in view of Du, disclose claim 1 as discussed above. Inuzuka is silent with respect to the face of the rotor defines a rotor lamination stack, and wherein the balancing member is in contact with the rotor lamination stack. Inuzuka in another embodiment discloses the face of the rotor 25 defines a rotor lamination stack ([0044] & claim 9), and wherein the balancing member is in contact with the rotor lamination stack (figs 4a-c, 63 in contact w/ rotor core 52). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the rotor of Inuzuka, or alternatively the rotor of Inuzuka in view of Du, so the face of the rotor defines a rotor lamination stack, and wherein the balancing member is in contact with the rotor lamination stack, as disclosed by Inuzuka in another embodiment, in order to reduce short circuit currents in the rotor core (as is known in the art for laminated rotor cores); and provide a stopper for the rotor core, as taught by Inuzuka ([0048]). Re claims 7 and 16, Inuzuka, or alternatively Inuzuka in view of Du, disclose claims 1 and 11, respectively, as discussed above. Inuzuka further discloses the bushing 63 surrounds a portion of the output shaft 51 adjacent the face of the rotor 25a (fig 6b). Re claims 8 and 17, Inuzuka, or alternatively Inuzuka in view of Du, disclose claims 1 and 11, respectively, as discussed above. Inuzuka further discloses the bushing 63 is composed of a brass material ([0048]). Re claims 9 and 18, Inuzuka disclose claims 1 and 11, respectively, as discussed above. Inuzuka further discloses the bushing 63 is molded to the fan 57 for rotation therewith (figs 6b-c, [0056], resin 67 fills space 70). Re claims 9 and 18, Inuzuka in view of Du disclose claims 1 and 11, respectively, as discussed above and further discloses the bushing 63 is molded to the fan for rotation therewith (Inuzuka, figs 6b-c, [0056]; Du, fig 5, [0079]). Re claims 10 and 19, Inuzuka, or alternatively Inuzuka in view of Du, disclose claims 1 and 11, respectively, as discussed above. Inuzuka further discloses the balancing member includes exactly one bushing 63 (figs 6a-c, only one bushing between the fan & rotor as required by claims 1 & 11). Re claim 15, Inuzuka, or alternatively Inuzuka in view of Du, disclose claim 11 as discussed above and further discloses the balancing feature 65 is formed on the bushing 63 after the bushing 63 is assembled on the output shaft 51 (another embodiment of Inuzuka, [0049]). Claims 2-5 and 12-14 are rejected under 35 U.S.C. 103 as being unpatentable over Inuzuka in view of Hessenberger et al. (US20140124231, “Hessenberger”) or alternatively Inuzuka in view of Du and in further view of Hessenberger. Re claims 2 and 12, Inuzuka, or alternatively Inuzuka in view of Du, disclose claims 1 and 11, respectively, as discussed above, but is silent with respect to the balancing feature is defined as a hole drilled into the outer circumference of the bushing. Hessenberger discloses the balancing feature 126 is defined as a hole drilled into the outer circumference 130 of the bushing 122 (fig 4, [0029]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the balancing feature of Inuzuka, or alternatively Inuzuka in view of Du, to be defined as a hole drilled into the outer circumference of the bushing, as disclosed by Hessenberger, in order to provide an equivalent means of removing material from the bushing, as taught by Hessenberger ([0029]). Re claims 3 and 13, Inuzuka in view of Hessenberger, or alternatively Inuzuka in view of Du and Hessenberger, disclose claims 2 and 12, respectively, as discussed above and further disclose the balancing feature 65 extends through a thickness of the bushing 63 (another embodiment of Inuzuka, figs 4b-c, through part of the radial thickness of 63. Re claim 4, Inuzuka in view of Hessenberger, or alternatively Inuzuka in view of Du and Hessenberger, disclose claim 2 as discussed above. Inuzuka is silent with respect to the hole is angled such that a center axis of the hole intersects the longitudinal axis. Hessenberger discloses the balancing the hole is angled such that a center axis of the hole intersects the longitudinal axis (figs 4 & below). PNG media_image1.png 252 459 media_image1.png Greyscale It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the hole of Inuzuka in view of Hessenberger, or alternatively Inuzuka in view of Du and Hessenberger, to be angled such that a center axis of the hole intersects the longitudinal axis, as disclosed by Hessenberger, in order to provide an equivalent means of removing material from the bushing, as taught by Hessenberger ([0029]). Re claims 5 and 14, Inuzuka, or alternatively Inuzuka in view of Du, disclose claims 1 and 11, respectively, as discussed above but is silent with respect to a plurality of balancing features are formed onto the bushing. Hessenberger discloses a plurality of balancing features 126 are formed onto the bushing 122 ([0029]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to configure the balancing feature of Inuzuka, or alternatively Inuzuka in view of Du, as a plurality of balancing features are formed onto the bushing, as disclosed by Hessenberger, in order to balance the rotor within the predetermined specification, as taught by Hessenberger ([0029]). Response to Arguments Applicant's arguments filed 12/9/2025 have been fully considered but they are not persuasive. Applicant argues that combining the two embodiments of Inuzuka teaches away from their combination (pg 8, 1st paragraph). Examiner disagrees. Applicant insists Inuzuka teaches employing resin 67 in figures 6a-c is equivalent to prebalancing the rotor during manufacturing. Applicant cites paragraph [0049] (reproduced below), which does not disclose employing resin automatically results in prebalancing. PNG media_image2.png 120 588 media_image2.png Greyscale Additionally for the embodiment of figs 6a-c Inuzuka discloses resin 67 increases strength of the rotor, as compared to adhesive, which may allow the rotor to operate at higher speeds ([0057], reproduced below). Inuzuka also discloses employing resin 67 makes it possible to correct balance using high-density brass ([0057]), but this citation is referring to the material of the rear and front stoppers 63, 64 (see [0048]) and not the resin. PNG media_image3.png 214 466 media_image3.png Greyscale It is not stated in paragraph [0057] that high-density brass must be employed with resin 67 or that notches 65 cannot be employed for balancing with resin 67. Therefore there is no teaching away of the combination of figures 6a-c and figures 4a-c. Applicant argues that Du teaches employing plastic 106 would not need notches of Inuzuka for balancing (pg 9, 2nd paragraph, citing Du [0091]). This argument is not persuasive since Du is employed to teach molded plastic to mold the rotor and form the fan (see OA, pg 7). Inuzuka is employed to combine the notched bushing and resin. Inuzuka does not teach or explicitly state a notched bushing cannot be employed with resin, as discussed above. Additionally applicant appears to cite paragraph [0091] which is stating since the material of the molded plastic 116 has the same density as the magnet wires 110, balancing of the rotor is not needed. But in the following paragraphs (figs 6-7, [0092-0093]) Du discusses adding features to the molded plastic 116 to improve balancing, such as removal of sacrificial molded material or molded pockets for weights. Therefore Du is also teaching a molded rotor can be balanced after molding. Conclusion THIS ACTION IS MADE FINAL. 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 extension fee 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 ERIC JOHNSON whose telephone number is (571)270-5715. The examiner can normally be reached on Mon-Fri 8:30-5pm EST. 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, Seye Iwarere can be reached on (571)270-5112. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see https://ppair-my.uspto.gov/pair/PrivatePair. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ERIC JOHNSON/Primary Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Nov 02, 2020
Application Filed
Feb 07, 2023
Non-Final Rejection — §103
May 12, 2023
Response Filed
May 20, 2023
Final Rejection — §103
Aug 25, 2023
Response after Non-Final Action
Aug 25, 2023
Notice of Allowance
Sep 06, 2023
Response after Non-Final Action
Oct 25, 2023
Response after Non-Final Action
Oct 25, 2023
Response after Non-Final Action
Nov 01, 2023
Response after Non-Final Action
Nov 06, 2023
Response after Non-Final Action
Nov 30, 2023
Response after Non-Final Action
Dec 05, 2023
Response after Non-Final Action
Feb 01, 2024
Response after Non-Final Action
Apr 04, 2024
Response after Non-Final Action
Apr 08, 2024
Response after Non-Final Action
Apr 09, 2024
Response after Non-Final Action
Apr 09, 2024
Response after Non-Final Action
Jun 23, 2025
Response after Non-Final Action
Sep 09, 2025
Non-Final Rejection — §103
Dec 09, 2025
Response Filed
Jan 06, 2026
Final Rejection — §103
Apr 01, 2026
Notice of Allowance
Apr 01, 2026
Response after Non-Final Action
Apr 15, 2026
Response after Non-Final Action

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
62%
Grant Probability
84%
With Interview (+22.0%)
3y 0m
Median Time to Grant
High
PTA Risk
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