Prosecution Insights
Last updated: July 17, 2026
Application No. 17/921,000

ROBOT CLEANER AND METHOD OF CONTROLLING ROBOT CLEANER

Final Rejection §103
Filed
Oct 24, 2022
Priority
Apr 24, 2020 — RE 10-2020-0050235 +1 more
Examiner
FORDJOUR, SARAH AKYAA
Art Unit
3723
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
LG Electronics Inc.
OA Round
4 (Final)
52%
Grant Probability
Moderate
5-6
OA Rounds
0m
Est. Remaining
80%
With Interview

Examiner Intelligence

Grants 52% of resolved cases
52%
Career Allowance Rate
73 granted / 139 resolved
-17.5% vs TC avg
Strong +28% interview lift
Without
With
+28.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
38 currently pending
Career history
190
Total Applications
across all art units

Statute-Specific Performance

§103
84.7%
+44.7% vs TC avg
§102
9.2%
-30.8% vs TC avg
§112
1.2%
-38.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 139 resolved cases

Office Action

§103
DETAILED ACTION ROBOT CLEANER AND METHOD OF CONTROLLING ROBOT CLEANER 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 . Response to Amendment The amendments filed 03-18-2026 has been entered. Claims 18-31 are currently pending and have been examined. Claims 1-7,10-17 have been cancelled. Claims 18-31 are newly added. The previous rejection has been updated due to applicant’s amendments. Response to Arguments Applicant's arguments filed 03-18-2026 have been fully considered but they are not persuasive. Regarding applicant's argument that the prior art combination of Jung, Liss and Knowpow fails to teach an origin is defined on the floor surface, that a circular cleaning region having a predetermined radius is defined around the origin, that a plurality of target points are disposed on the circumference of the circular cleaning region, and that the robot cleaner reciprocates between the origin and the plurality of target points traveling path of the main body when traveling from the target points to the origin is a straight path, and the other is a curved path having a predetermined curvature due to prior art discloses an obstacle detection device measures when the robot cleaner is in a stand-still. Examiner, respectfully disagrees Liss discloses creating circular map (see figure 4), while device is in a standstill, but the map created is used and stored within the robot cleaner to be used while the robot cleaner travels to ensure it avoids obstacles. (“this as a result of rotating scanning in a preferably horizontal scanning plane, i.e. in a plane running parallel to the floor 2, so that the device 1 can move on the floor 2 or in its surroundings without collision” and “ walls in the surroundings are preferably used to create a map representation K of the entire area, which map representation K is saved and stored in the device 1.”) Further, prior art Knopow discloses programming the travel path for a robotic cleaner to include a predetermined curvature (see para 0052,0070,0086). 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 (i.e., changing from AIA to pre-AIA ) 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. Claim(s) 18-31 is/are rejected under 35 U.S.C. 103 as being unpatentable over Jung (KR20190007608A) in view of Liss (DE102011000536A1) and Knopow (US20110004342A1). Regarding claim 18, Jung teaches a main body (10,22+21 , figure 1) having a bumper (21, figure 1) provided on a front surface (“a first bumper 21 formed on the first outer periphery of the main body 10”) thereof and having a space for accommodating a battery (190; “ a power supply unit 190 installed inside the main body 10”), a water container (211, 221, figure 2 and 4), and a motor (150, ; “the driving unit 150 may include a first driving unit 151 and a second driving unit 152, and may include a motor and / or a gear assembly”) therein; a pair of rotary plates (110, 120, figure 2 and 4) rotatably disposed on a bottom surface of the main body and having lower sides to which mops facing a floor surface are coupled; a control part (170; “ controller 170 controls at least one of the rotational direction and the rotational speed of the rotary members 110 and 120”) configured to control the rotation of the pair of rotary plates, wherein the main body travels due to friction (“Meanwhile, when the pair of rotating members 110 and 120 rotate according to a predetermined angle, the relative frictional force generated between the surface to be cleaned and the cleaners 212 and 222 may be larger than the center of the main body 10. Therefore, the traveling speed and traveling direction of the robot cleaner 100 can be controlled by the relative frictional force” )with the floor surface, Jung fails to teach when the mop rotates, wherein an origin is defined on the floor surface, wherein a circular cleaning region having a predetermined radius is defined around the origin, wherein a plurality of target points are disposed on a circumference of the circular cleaning region, wherein the main body reciprocates between the origin and the plurality of target points, and wherein one of a traveling path from the origin to the target point and a traveling path from the target point to the origin is a straight path and the other is a curved path having a predetermined curvature. Liss teaches a method of controlling the navigation of a robotic cleaner that includes controlling the main body of robotic cleaner (1, figure 1) so that when the mop rotates, wherein an origin is defined on the floor surface (10, figure 4), wherein a circular region having a predetermined radius (figures 4 and 7-8; “Starting from each section 10 , in particular free partial area 10 Hereinafter, a map section K .sub.A is first defined, wherein the respective edge length is preferably adapted to the detection area of the obstacle recognition system A. Thus, each subarea 10 rotationally invariant, ie independent of the current orientation of the device 1 is, the corners of the square map sections K .sub.A are darkened or hidden, so that thereafter a rotation-invariant maps circular section K .sub.KA with the associated portion 10 as a means” or “From every section 10 Starting at a predetermined number of angles, preferably 360 angles, a total of 360 ° around the sub-area 10 around the distance a calculated to the next obstacle H within the card circle section K .sub.KA , this preferably using the Bresenham algorithm. The maximum distance a is correspondingly limited by the map circular section K .sub.KA equal to the radius of the circular section From the sum of the distances a preferably 360 distance measurements around the partial area 10 around”).is defined around the origin, wherein a plurality of target points (figures 4 and 7-8) are disposed on a circumference of the circular region, wherein the main body reciprocates between the origin and the plurality of target points, and wherein one of a traveling path from the origin to the target point( figures 4 and 7-8) It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Jung so that the controller can control the main body so when the mop rotates, wherein an origin is defined on the floor surface, wherein a circular cleaning region having a predetermined radius is defined around the origin, wherein a plurality of target points are disposed on a circumference of the circular region, wherein the main body reciprocates between the origin and the plurality of target points, based on the teachings of Liss. Further, Jung as modified by Liss would disclose a circular cleaning region having a predetermined radius. Knopow teaches a trainable multi-mode floor cleaning where a user trains the cleaning device to have one or multiple desired cleaning paths that includes a curved path having a predetermined curvature. (see para 0052,0070,0086). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Jung so that the controller has a control method for the robotic cleaner that includes traveling path that has a curved path having a predetermined curvature based on the teachings of Knopow. This modification would provide an autonomous floor cleaning device with a guidance/control system having more efficient operation (see para 0009-0012,0052-0054,0080 of Knopow). Regarding claim 19, modified Jung teaches wherein the plurality of target points is disposed on a concentric circle having the origin as a center thereof. (see Liss figures 4,7-8). Regarding claim 20, modified Jung teaches wherein the plurality of target points (see Liss, figure 4) are arranged at a predetermined phase difference (see pages 4-6,8 of Liss) along the circumference of the circular cleaning region. Regarding claim 21, modified Jung teaches wherein a movement route in which the main body moves from the origin to the target point is different from a movement route in which the main body moves from the target point to the origin. (see Hong figure 10a and figures 4 and 7-8 of Liss). Regarding claim 22, Jung teaches a main body (10, 22+21, figure 1); a pair of rotary plates (110, 120, figure 2 and 4) rotatably disposed on a bottom surface of the main body ( figures 2 and 4) and having mops (212 and 222, figure 2 and 4) coupled thereto; a control part (170; “ controller 170 controls at least one of the rotational direction and the rotational speed of the rotary members 110 and 120”) configured to control the rotation of the pair of rotary plates, movement is a straight path (“straight cleaning mode”) Jung fails to teach wherein the control part defines a circular cleaning region having a predetermined radius around an origin on a floor surface, wherein the robot cleaner reciprocates between the origin and a point located on a circumference of the circular cleaning region, and wherein one path of the reciprocating and another path of the reciprocating movement is a curved path having a predetermined curvature. Liss teaches a method of controlling a robotic (abstract) that includes a circular region (figure 4) have a predetermined radius around (A, figure 4 pages 6-8) an origin (10, figure 4) on a floor surface, wherein the robot cleaner reciprocates between the origin and a point located on a circumference of the circular region ( figures 4 and 7-8; “Starting from each section 10 , in particular free partial area 10 Hereinafter, a map section K .sub.A is first defined, wherein the respective edge length is preferably adapted to the detection area of the obstacle recognition system A. Thus, each subarea 10 rotationally invariant, ie independent of the current orientation of the device 1 is, the corners of the square map sections K .sub.A are darkened or hidden, so that thereafter a rotation-invariant maps circular section K .sub.KA with the associated portion 10 as a means” or “From every section 10 Starting at a predetermined number of angles, preferably 360 angles, a total of 360 ° around the sub-area 10 around the distance a calculated to the next obstacle H within the card circle section K .sub.KA , this preferably using the Bresenham algorithm. The maximum distance a is correspondingly limited by the map circular section K .sub.KA equal to the radius of the circular section From the sum of the distances a preferably 360 distance measurements around the partial area 10 around”). Further, Jung as modified by Liss would disclose a circular cleaning region having a predetermined radius. Knopow teaches a trainable multi-mode floor cleaning where a user trains the cleaning device to have one or multiple desired cleaning paths that includes a curved path having a predetermined curvature. (see para 0052,0070,0086). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Jung so that the controller has a control method for the robotic cleaner that includes traveling path that has a curved path having a predetermined curvature based on the teachings of Knopow. This modification would provide an autonomous floor cleaning device with a guidance/control system having more efficient operation (see para 0009-0012,0052-0054,0080 of Knopow). Regarding claim 23, Jung teaches a pair of rotary plates (110, 120, figure 2 and 4) having lower sides to which mops (212 and 222, figure 2 and 4) facing a floor surface are coupled, the robot cleaner being configured to move in a circular cleaning region with a predetermined radius by a control part's (170; “ controller 170 controls at least one of the rotational direction and the rotational speed of the rotary members 110 and 120”) control of the pair of rotary plates, Jung fails to teach setting an origin on a floor surface; defining a circular cleaning region having a predetermined radius around the origin; setting a plurality of target points on a circumference of the circular cleaning region; a first movement step of moving the robot cleaner from the origin toward one of the target points;; a returning rotation step of rotating the robot cleaner in place by a predetermined returning rotation angle after the first movement step; a second movement step of moving the robot cleaner from the target point toward the origin; and a direction change step of rotating the robot cleaner by a predetermined direction change angle so that the robot cleaner faces another target point. Liss teaches a method of controlling robotic cleaner (1, figure 1) that includes moving the robot cleaner in a circular region (see KsubKa, figure 4) with a predetermined radius (A, figure 4), the method comprising setting an origin on a floor surface (10, figure 4); defining a circular region (see KsubKa, figure 4) having a predetermined radius (a, figure 4)around the origin; setting a plurality of target points on a circumference of the circular cleaning region (figure 4); a first movement step of moving the robot cleaner from the origin (10, figure 4) toward one of the target points;; a returning rotation step of rotating the robot cleaner in place by a predetermined returning rotation angle after the first movement step; a second movement step of moving the robot cleaner from the target point toward the origin ((see figure 4 and 7-8; “Starting from each section 10 , in particular free partial area 10 Hereinafter, a map section K .sub.A is first defined, wherein the respective edge length is preferably adapted to the detection area of the obstacle recognition system A. Thus, each subarea 10 rotationally invariant, ie independent of the current orientation of the device 1 is, the corners of the square map sections K .sub.A are darkened or hidden, so that thereafter a rotation-invariant maps circular section K .sub.KA with the associated portion 10 as a means” or “From every section 10 Starting at a predetermined number of angles, preferably 360 angles, a total of 360 ° around the sub-area 10 around the distance a calculated to the next obstacle H within the card circle section K .sub.KA , this preferably using the Bresenham algorithm. The maximum distance a is correspondingly limited by the map circular section K .sub.KA equal to the radius of the circular section From the sum of the distances a preferably 360 distance measurements around the partial area 10 around”); Further, Jung as modified by Liss would disclose a circular cleaning region having a predetermined radius. Knopow teaches a trainable multi-mode floor cleaning where a user trains the cleaning device to have one or multiple desired cleaning paths that includes a curved path having a predetermined curvature. (see para 0052,0070,0086). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Jung so that the controller has a control method for the robotic cleaner that includes traveling path that has a returning rotation step of rotating the robot cleaner in place by a predetermined returning rotation angle after the first movement step based on the teachings of Knopow. This modification would provide an autonomous floor cleaning device with a guidance/control system having more efficient operation. (see para 0009-0012,0052-0054,0080 of Knopow) Regarding claim 24, modified Jung teaches wherein the first movement step moves the robot cleaner rectilinearly to a predetermined target point. (see Liss figure 4). Regarding claim 25, modified Jung teaches wherein the second movement step moves the robot cleaner along a route different from a movement route in the first movement step (see Knowpow para 0052,0070,0086 and figures 4 and 7-8 of Liss). Regarding claim 26, modified Jung teaches wherein the circular cleaning region is defined by an imaginary circle (see Liss KsubKA, figure 4) having the origin (see Liss 10, figure 4) as a center thereof. Regarding claim 27, modified Jung teaches : wherein the origin (see Liss 10, figure 4) is used as a starting point of the reciprocating movement. Regarding claim 28, modified Jung teaches wherein the target points (see Liss, figure 4) are arranged at a predetermined phase difference along the circumference of the circular cleaning region (see pages 4-6 of Liss). Regarding claim 29, modified Jung teaches a movement preparation step of disposing the robot cleaner at an initial starting point before the first movement step. (see Liss figure 4 and Liss discloses “Preferably before a first free ride of the device 1 in the space R, the map representation K is first by means of a grid 9 in equal parts 10 divided, preferably in square sections with an edge length of 20 to 60 mm, more preferably 40 mm. The subareas 10 are hereafter preferred numbers first assigned, for example, the number 255 (light), if the subarea 10 is free, the number 0 (dark), if the sub-area is occupied by an obstacle H, continue with numbers between 0 and 255 for different shades of gray. Starting from each section 10, in particular free partial area 10 Hereinafter, a map section K .sub.A is first defined, wherein the respective edge length is preferably adapted to the detection area of the obstacle recognition system A. Thus, each subarea 10 rotationally invariant, ie independent of the current orientation of the device 1 is, the corners of the square map sections K .sub.A are darkened or hidden, so that thereafter a rotation-invariant maps circular section K .sub.KA with the associated portion 10 as a means”). Regarding claim 30, modified Jung teaches a movement ending step of stopping the robot cleaner when the robot cleaner is positioned at the initial starting point. (see Liss figures 7-8 returns to x and moves x1 start pattern figure 4). Regarding claim 31, modified Jung teaches a multiple of the direction change angle (0) is a multiple of 360°. (Starting from each section 10 , in particular free partial area 10 Hereinafter, a map section K .sub.A is first defined, wherein the respective edge length is preferably adapted to the detection area of the obstacle recognition system A. Thus, each subarea 10 rotationally invariant, ie independent of the current orientation of the device 1 is, the corners of the square map sections K .sub.A are darkened or hidden, so that thereafter a rotation-invariant maps circular section K .sub.KA with the associated portion 10 as a means” or “From every section 10 Starting at a predetermined number of angles, preferably 360 angles, a total of 360 ° around the sub-area 10 around the distance a calculated to the next obstacle H within the card circle section K .sub.KA , this preferably using the Bresenham algorithm. The maximum distance a is correspondingly limited by the map circular section K .sub.KA equal to the radius of the circular section From the sum of the distances a preferably 360 distance measurements around the partial area 10 around”). 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 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 SARAH AKYAA FORDJOUR whose telephone number is (571)272-0390. The examiner can normally be reached Monday - Thursday 9:30am - 5:30pm and Friday 6:00am-3:00pm. 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, Monica Carter can be reached at 571-272-4475. 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. /SARAH AKYAA FORDJOUR/Examiner, Art Unit 3723 /MONICA S CARTER/Supervisory Patent Examiner, Art Unit 3723
Read full office action

Prosecution Timeline

Show 1 earlier event
Jan 29, 2025
Non-Final Rejection mailed — §103
Apr 29, 2025
Response Filed
Aug 11, 2025
Final Rejection mailed — §103
Oct 23, 2025
Request for Continued Examination
Oct 27, 2025
Response after Non-Final Action
Dec 19, 2025
Non-Final Rejection mailed — §103
Mar 18, 2026
Response Filed
Jun 04, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

5-6
Expected OA Rounds
52%
Grant Probability
80%
With Interview (+28.0%)
3y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 139 resolved cases by this examiner. Grant probability derived from career allowance rate.

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