Prosecution Insights
Last updated: July 17, 2026
Application No. 18/698,442

Flow Element and Electric Machine With a Flow Element

Final Rejection §102§103
Filed
Apr 04, 2024
Priority
Dec 20, 2021 — DE 10 2021 133 860.3 +1 more
Examiner
STEFANON, JUSTIN
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Bayerische Motoren Werke Aktiengesellschaft
OA Round
2 (Final)
51%
Grant Probability
Moderate
3-4
OA Rounds
11m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 51% of resolved cases
51%
Career Allowance Rate
95 granted / 186 resolved
-16.9% vs TC avg
Strong +48% interview lift
Without
With
+48.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
40 currently pending
Career history
238
Total Applications
across all art units

Statute-Specific Performance

§103
64.8%
+24.8% vs TC avg
§102
33.2%
-6.8% vs TC avg
§112
1.4%
-38.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 186 resolved cases

Office Action

§102 §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 . Response to Arguments Applicant’s arguments, see page 8, filed 03/10/2026, with respect to objections to the drawings and specification and rejections of claims 23-25 under 35 USC 112 have been fully considered and are persuasive. The objections to the spec and drawings and the rejections of claims 23-25 under 35 USC 112 have been withdrawn. Applicant’s arguments with respect to claim(s) 10-14 and 18-26 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. Drawings The drawings were received on 03/10/2026. These drawings are acceptable. Claim Rejections - 35 USC § 102 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 10-14 and 21-26 are rejected under 35 U.S.C. 102(a)(2) as being anticipated by ROUX (US-20230344311; previously cited). Regarding claim 10, ROUX discloses an electric machine comprising: a rotor 1 which is arranged on a rotor shaft 5; a stator 2; and a flow element 10 which includes a collection structure configured to collect a fluid (para [0153]) discharged from the rotor shaft 5 and to direct the fluid into an inner space of the electric machine to a front side of the rotor 1 (Fig. 1) wherein the flow element 10 has a plurality of flow structures 20 disposed throughout a surface of the flow element 10 facing the rotor and configured to disrupt a fluid flow, each of the plurality of flow structures 20 having a rounded knob shape and being arranged in a predicted flow path (Fig. 11b). PNG media_image1.png 661 552 media_image1.png Greyscale PNG media_image2.png 512 580 media_image2.png Greyscale Regarding claim 11, ROUX discloses the electric machine according to claim 10, wherein the flow element 10 is configured to direct the fluid to at least one stator winding 4 of the stator 2 (para [0118] and [0155] and Fig. 1). Regarding claim 12, ROUX discloses the electric machine according to claim 10, wherein the flow element 10 is arranged in a fluid flow which is discharged from the rotor shaft 5 (Fig. 1). Regarding claim 13, ROUX discloses the electric machine according to claim 11, wherein the flow element 10 is arranged in a fluid flow which is discharged from the rotor shaft 5 (Fig. 1). Regarding claim 14, ROUX discloses the electric machine according to claim 10, wherein the flow element 10 is in a form of an annular disk (Fig. 2, 5, 11b). PNG media_image3.png 608 505 media_image3.png Greyscale PNG media_image4.png 648 519 media_image4.png Greyscale Regarding claim 21, ROUX discloses the electric machine according to claim 10, wherein the flow element 10 has at least one redirecting structure 12b which is configured to direct a redirectable fluid flow to at least one stator winding 4 (Fig. 1). Regarding claim 22, ROUX discloses the electric machine according to claim 11, wherein the flow element 10 has at least one redirecting structure 12b which is configured to direct a redirectable fluid flow to at least one stator winding 4 (Fig. 1). Regarding claim 23, ROUX discloses the electric machine according to claim 10, wherein a surface of the flow element 10 facing away from the rotor is configured as a smooth surface (Fig. 1). Regarding claim 24, ROUX discloses the electric machine according to claim 11, wherein a surface of the flow element 10 facing away from the rotor is configured as a smooth surface (Fig. 1, 10d). PNG media_image5.png 663 506 media_image5.png Greyscale Regarding claim 25, ROUX discloses the electric machine according to claim 12, wherein a surface of the flow element 10 facing away from the rotor is configured as a smooth surface (Fig. 1, 10d). Regarding claim 26, ROUX discloses a flow element 10 which is configured to be arranged in an electric machine and to guide a fluid for the electric machine (para [0153]) the flow element 10 comprising: a collection structure 14 configured to collect a fluid discharged from a rotor shaft 5 and to direct the fluid into an inner space of the electric machine to a front side of a rotor 1 (Fig. 1); and a plurality of flow structures 20 disposed throughout a surface of the flow element 10 facing the rotor 1 and configured to disrupt a fluid flow, each of the plurality of flow structures 20 having a rounded knob shape and being arranged in a predicted flow path (Fig. 11b). Claim Rejections - 35 USC § 103 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 18-20 are rejected under 35 U.S.C. 103 as being unpatentable over ROUX in view of PAL (US 20160172937). Regarding claim 18, ROUX discloses the electric machine according to claim 10, wherein the flow element 10 has at least one guide channel 52 which is configured to direct a fluid flow to a rotor (Fig. 1). However, ROUX does not disclose the rotor having a winding. PAL discloses an electric machine with a flow element (24, 36) configured to direct a fluid flow to a rotor winding 26 (see para [0020]). 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 to provide the electric machine of ROUX with a rotor having windings, similar to PAL. A person having ordinary skill in the art to which the claimed invention pertains would have been motivated to make such modification in order to convert “mechanical energy into electrical energy, as is known by one of ordinary skill in the art” as taught by PAL (see para [0016]). Regarding claim 19, ROUX discloses the electric machine according to claim 11, wherein the flow element 10 has at least one guide channel 52 which is configured to direct a fluid flow to a rotor (Fig. 1). However, ROUX does not disclose the rotor having a winding. PAL discloses an electric machine with a flow element (24, 36) configured to direct a fluid flow to a rotor winding 26 (see para [0020]). 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 to provide the electric machine of ROUX with a rotor having windings, similar to PAL. A person having ordinary skill in the art to which the claimed invention pertains would have been motivated to make such modification in order to convert “mechanical energy into electrical energy, as is known by one of ordinary skill in the art” as taught by PAL (see para [0016]). Regarding claim 20, ROUX discloses the electric machine according to claim 12, wherein the flow element 10 has at least one guide channel 52 which is configured to direct a fluid flow to a rotor (Fig. 1). However, ROUX does not disclose the rotor having a winding. PAL discloses an electric machine with a flow element (24, 36) configured to direct a fluid flow to a rotor winding 26 (see para [0020]). 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 to provide the electric machine of ROUX with a rotor having windings, similar to PAL. A person having ordinary skill in the art to which the claimed invention pertains would have been motivated to make such modification in order to convert “mechanical energy into electrical energy, as is known by one of ordinary skill in the art” as taught by PAL (see para [0016]). 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. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. US-20220360133-A1 Striedelmeyer plurality of flow structures 15,16 having a rounded knob shape and being arranged in a predicted flow path; US-20240235303-A1 PIEPER discloses a plurality of flow structures 51 having a rounded knob shape and being arranged in a predicted flow path. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JUSTIN STEFANON whose telephone number is (703)756-4648. The examiner can normally be reached Monday - Thursday and alternate Fridays 8AM - 5PM EDT. 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. /JUSTIN STEFANON/Examiner, Art Unit 2834 /OLUSEYE IWARERE/Supervisory Patent Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Apr 04, 2024
Application Filed
Dec 30, 2025
Non-Final Rejection mailed — §102, §103
Mar 10, 2026
Response Filed
Jun 08, 2026
Final Rejection mailed — §102, §103 (current)

Precedent Cases

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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
51%
Grant Probability
99%
With Interview (+48.0%)
3y 2m (~11m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 186 resolved cases by this examiner. Grant probability derived from career allowance rate.

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