Prosecution Insights
Last updated: September 17, 2026
Application No. 18/834,568

Stator and Electrical Machine

Final Rejection §103
Filed
Jul 30, 2024
Priority
Feb 01, 2022 — DE 10 2022 102 321.4 +1 more
Examiner
GONZALEZ QUINONES, JOSE A
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Feaam GmbH
OA Round
2 (Final)
76%
Grant Probability
Favorable
3-4
OA Rounds
4m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
897 granted / 1181 resolved
+8.0% vs TC avg
Moderate +12% lift
Without
With
+12.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
42 currently pending
Career history
1199
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
66.9%
+26.9% vs TC avg
§102
27.2%
-12.8% vs TC avg
§112
4.2%
-35.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1181 resolved cases

Office Action

§103
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 Arguments Applicant’s arguments, see pages 4-10, filed07/10/2026, with respect to claims 1-13 have been fully considered and are persuasive. The rejection of claims 1-13 has been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of Sherestha et al. (US PG Pub 2016/0181893) and Cros et al. (US PG Pub 2004/0007936). Information Disclosure Statement The information disclosure statements (IDS) submitted on 06/02/2026 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. 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. Claim(s) 1-2, 5-13 is/are rejected under 35 U.S.C. 103 as being unpatentable over Guang (Non Patent Literature, 2016) hereinafter Guang in view of Sherestha et al. (US PG Pub 2016/0181893) and Cros et al. (US PG Pub 2004/0007936). As to independent claim 1, Guang teaches stator (see annotated Figure 1c) for an electrical machine (see title), the stator comprising: stator teeth (see annotated Figure 1c), which are distributed along the a circumference of the stator;(1) and between which grooves (2) are formed between the stator teeth (see annotated Figure 1c) in each case, wherein coils of phase phases (A, B,C,D, E) are each wound around teeth (see annotated Figure 1c) formed between the grooves (see annotated Figure 1c), each coil corresponding to a respective wound tooth (see annotated Figure 1c), where wherein the number of phases (A, B,C,D, E) is greater than three, wherein at least one unwound tooth (4) is provided between each of the wound teeth (3), in which wherein at least one of the wound teeth has a recess which extends substantially in the a radial direction and is arranged in the a tooth region, or in which the at least one of the at least one unwound tooth (see annotated Figure 1c) non wound tooth (4) in each case has a recess (see annotated Figure 1c) which extends substantially in the a radial direction and is arranged in the a tooth region, and wherein the stator teeth (see annotated Figure 1c) comprise the wound teeth (see annotated Figure 1c) and the at least one unwound tooth (see annotated Figure 1c). PNG media_image1.png 419 471 media_image1.png Greyscale However Guang teaches the claimed limitation as discussed above except wherein all of the coils have a same winding direction and a same coil sequence, and wherein each of the coils is for being fed by an individual electrical phase. Sherestha et al. teaches all of the coils (120) have a same winding direction and a same coil sequence, and wherein each of the coils (120) is for being fed by an individual electrical phase as shown in figure 5A, and see claim 4, for the advantageous benefit of providing a multiphase fractional slot concentrated winding machine with an integrated or detachable end mounted multiphase series converter circuit. Cross et al. teaches coil sequence, (see paragraph [0059] and [0070]), for the advantageous benefit of providing a regular and predictable multiphase winding arrangement and facilitating generation of the desired rotating magnetic field. It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify Guang by using all of the coils have a same winding direction and a same coil sequence, and wherein each of the coils is for being fed by an individual electrical phase, as taught by Sherestha et al. and Cros et al., to provide a multiphase fractional slot concentrated winding machine with an integrated or detachable end mounted multiphase series converter circuit and a regular and predictable multiphase winding arrangement and facilitating generation of the desired rotating magnetic field. As to claim 2/1, Guang teaches wherein all wound teeth or all unwound teeth (see annotated Figure 1c) have a recess (see annotated Figure 1c) as shown in figure 1. As to claim 5/1, Guang teaches wherein a higher harmonic of the a magnetomotive force different from the-fundamental waves is for being used as the a working wave as shown in figure 1c and see page 1027. As to claim 6/1, Guang teaches wherein a multiphase (A,B,C,D,E) single-layer winding comprising the aforementioned-coils is inserted into the grooves (see annotated figure 1c) as shown in figure 1c. As to claim 7/1, Guang teaches comprising a single-layer winding with coils of at least five different phases (A, B, C, D, E) as shown in figure 1c. As to claim 8/1, Guang teaches wherein all of the coils (see figure 1c, phase A, B,C, D, E) have the same winding direction and a same coil sequence as shown in figure 1c. As to claim 9/1, Guang teaches wherein each of the coils is for being fed by an individual electrical phase (A, B, C, D, E) as shown in figure 1c As to claim 10/1, Guang teaches wherein the stator teeth (see annotated figure 1c) are alternately wound and unwound along the circumference of the stator (see annotated figure 1c) as shown in figure 1c As to claim 11/1, Guang teaches wherein the stator teeth (see annotated figure 1c) are distributed symmetrically along the circumference of the stator (see annotated figure 1c) as shown in figure 1c. As to claim 12/1, Guang teaches with a stator (see annotated figure 1c) and with a rotor (see annotated figure 1c) as shown in figure 1c. As to claim 13/12, Guang teaches wherein the rotor (see annotated figure 1c) is designed as a rotor with permanent magnets (see page 1025). 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. Claim(s) 3 is/are rejected under 35 U.S.C. 103 as being unpatentable over Guang (Non Patent Literature, 2016) hereinafter Guang, Sherestha et al. (US PG Pub 2016/0181893) and Cros et al. (US PG Pub 2004/0007936) as applied in claim 1 above, and further in view of Dajaku (US PG Pub 2015/0123510). As to claim 3/1, Guang in view Sherestha et al. and Cros et al. teaches the claimed limitation as discussed above except wherein the recess of the at least one of the wound teeth forms a mechanical barrier to reduce of the fundamental waves of the-a magnetic flux, and wherein the recess of the at least one of the at least one unwound tooth forms a mechanical barrier to reduce fundamental waves of a magnetic flux. However Dajaku teaches the recess (4) of the at least one of the wound teeth (see annotated figure 6) forms a mechanical barrier to reduce of the fundamental waves of the-a magnetic flux, and wherein the recess (4) of the at least one of the at least one unwound tooth (see annotated figure 6) forms a mechanical barrier to reduce fundamental waves of a magnetic flux as shown in figure 6, for the advantageous benefit of providing the efficiency of the machine increased and/or or undesired acoustic impairments and vibrations are reduced. It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify Guang in view Sherestha et al. and Cros et al. by using the recess of the at least one of the wound teeth forms a mechanical barrier to reduce of the fundamental waves of the-a magnetic flux, and wherein the recess of the at least one of the at least one unwound tooth forms a mechanical barrier to reduce fundamental waves of a magnetic flux, as taught by Dajaku, to provide the efficiency of the machine increased and/or or undesired acoustic impairments and vibrations are reduced. Claim(s) 4 is/are rejected under 35 U.S.C. 103 as being unpatentable over Guang (Non Patent Literature, 2016), Sherestha et al. (US PG Pub 2016/0181893), Cros et al. (US PG Pub 2004/0007936) and Dajaku (US PG Pub 2015/0123510) hereinafter Guang as applied in claim 1 above, and further in view of Dajaku (US PG Pub 2015/0123510) and Wang (CN109286295). As to claim 4/1, Guang, Sherestha et al. and Cros et al. in view of Dajaku teaches wound the claimed limitation as discussed above except wherein the a distance between the recesses of the at least one of the wound teeth corresponds to twice the a distance between the grooves, and wherein a distance between the recesses of the at least one of the at least one unwound tooth corresponds to twice the distance between the grooves. However Dajaku teaches unwound teeth and wound teeth with recess (4) as shown in figure 6, for the advantageous benefit of providing the efficiency of the machine increased and/or or undesired acoustic impairments and vibrations are reduced. Wang teaches the a distance between the recesses (5) corresponds to twice the a distance between the grooves (see annotated figure 3) as shown in figure 3, for the advantageous benefit of improving the performance of the motor and improve the torque density and operational efficiency of the motor. PNG media_image2.png 470 532 media_image2.png Greyscale It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify Guang, Sherestha et al. and Cros et al. in view of Dajaku by using the a distance between the recesses of the at least one of the wound teeth corresponds to twice the a distance between the grooves, and wherein a distance between the recesses of the at least one of the at least one unwound tooth corresponds to twice the distance between the grooves, as taught by Dajaku and Wang, to provide the efficiency of the machine increased and/or or undesired acoustic impairments and vibrations are reduced and improve the performance of the motor and improve the torque density and operational efficiency of the motor. 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 A GONZALEZ QUINONES whose telephone number is (571)270-7850. The examiner can normally be reached Monday-Friday: 6:30-2:30 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, OLUSEYE IWARERE can be reached at (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 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 A GONZALEZ QUINONES/ Primary Examiner, Art Unit 2834 August 14, 2026
Read full office action

Prosecution Timeline

Jul 30, 2024
Application Filed
Apr 13, 2026
Non-Final Rejection mailed — §103
Jul 10, 2026
Response Filed
Aug 18, 2026
Final Rejection mailed — §103 (current)

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

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Prosecution Projections

3-4
Expected OA Rounds
76%
Grant Probability
88%
With Interview (+12.5%)
2y 5m (~4m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1181 resolved cases by this examiner. Grant probability derived from career allowance rate.

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