Prosecution Insights
Last updated: October 02, 2026
Application No. 18/631,443

PROPULSION SYSTEM FOR A MARINE VESSEL AND A USE OF A SLIP CLUTCH ASSEMBLY

Non-Final OA §102
Filed
Apr 10, 2024
Priority
Apr 14, 2023 — EU 23167937.4
Examiner
SEHN, MICHAEL L
Art Unit
3745
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Volvo Group
OA Round
3 (Non-Final)
81%
Grant Probability
Favorable
3-4
OA Rounds
3m
Est. Remaining
94%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
540 granted / 666 resolved
+11.1% vs TC avg
Moderate +13% lift
Without
With
+12.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
16 currently pending
Career history
684
Total Applications
across all art units

Statute-Specific Performance

§101
1.3%
-38.7% vs TC avg
§103
48.1%
+8.1% vs TC avg
§102
22.3%
-17.7% vs TC avg
§112
24.5%
-15.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 666 resolved cases

Office Action

§102
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 Pages 6-9 of the response, filed 08/21/2026, with respect to the rejection(s) made under 35 U.S.C. §102(a)(1) and §103, have been fully considered and are persuasive. As discussed in the interview conducted on 08/25/2026, the cited shaft is not concentric with or arranged inside of the cited rotary drive (see attached interview summary). Therefore, the rejection has been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of Shimanckas. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1, 3-4, 13-15, and 17-19 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Shimanckas (US Patent No: 3,310,021). Regarding Claim 1: Shimanckas discloses propulsion system (Figure 2) for a marine vessel (Column 1, Lines 9-10), the propulsion system comprising a propulsion unit (123), a transom bracket (Figures 3-4, No. 125) to rotatably attach the propulsion unit to the marine vessel about an axis (Figure 6, No. 254), the transom bracket being adapted to be secured to the marine vessel (Figures 3-4; Column 2, Lines 54-59), a rotary drive (271) arranged to rotate the propulsion unit about the axis by applying a torque about the axis, a shaft (177) to which the propulsion unit is secured (Figure 6), the rotary drive being arranged to rotate the shaft, and thereby the propulsion unit, about the axis (Column 4, Lines 57-63), wherein the rotary drive and the shaft are concentric (Figure 6) and the shaft is arranged inside the rotary drive (Figure 6); and a slip clutch assembly (273) operationally arranged between the propulsion unit and the rotary drive to allow a rotational motion between the propulsion unit and the rotary drive about the axis in case the propulsion unit impacts an obstacle (Column 4, Line 75; Column 5, Lines 1-4). Regarding Claim 3: Shimanckas discloses the propulsion system of Claim 1, wherein the slip clutch assembly is configured to allow a rotational motion between the propulsion unit and the rotary drive when a torque between the propulsion unit and the rotary drive about the axis exceeds a threshold torque value (Column 4, Line 75; Column 5, Lines 1-4). Regarding Claim 4: Shimanckas discloses the propulsion system of Claim 1, wherein the slip clutch assembly is configured to allow a rotational motion along a predetermined slip rotation angle when a torque between the propulsion unit and the rotary drive exceeds a threshold torque value at the beginning of the rotational motion, the slip clutch assembly optionally being configured to allow a stepwise rotational motion along predetermined slip rotation angles (Column 4, Line 75; Column 5, Lines 1-4). Regarding Claim 13: Shimanckas discloses the propulsion system of Claim 1, wherein the rotary drive comprises an input interface that is adapted to engage a drive unit (175) such that the drive unit may rotate the rotary drive (Column 4, Lines 56-59), wherein the rotary drive comprises an engaging member or a receiving recess that forms part of the slip clutch assembly (Column 5, Lines 65-69). Regarding Claim 14: Shimanckas discloses the propulsion system of Claim 1, wherein the rotary drive has the shape of a circular cylinder (Figure 6). Regarding Claim 15: Shimanckas discloses the propulsion system of Claim 1, comprising a drive unit (175) arranged to rotate the rotary drive (Column 4, Lines 56-59). Regarding Claim 17: Shimanckas discloses the propulsion system of Claim 15, comprising an electric trim motor (175; Column 3, Lines 61-62) that is arranged to rotate the drive unit. Regarding Claim 18: Shimanckas discloses the propulsion system of Claim 1, wherein the propulsion unit is rotatably attached to the marine vessel about a trim axis (254) that is horizontal. Regarding Claim 19: Shimanckas discloses the propulsion system of Claim 1, wherein the propulsion unit comprises a support part (283) and a thrust part (279; Column 5, Lines 50-51), wherein the thrust part is rotatable with respect to the support part about a steering axis to direct the thrust of the propulsion unit (Figure 10). Allowable Subject Matter Claims 6-10 and 16 are objected to as being dependent upon a rejected base claim but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: The prior art fails to disclose a propulsion system as claimed in Claim 1, wherein the slip clutch assembly is formed by the shaft and the rotary drive, wherein the slip clutch assembly is operationally arranged between the shaft and the rotary drive, wherein the slip clutch assembly comprises an engaging member and a receiving recess, which may be engaged or disengaged, and wherein the slip clutch assembly is configured such that the rotational motion between the propulsion unit and the rotary drive about the axis is allowed when the engaging member and the receiving recess are disengaged, or wherein the drive unit comprises a worm gear and the rotary drive comprises an input interface that is adapted to engage the worm gear. Shimanckas discloses a propulsion system as claimed in Claim 1; however, the slip clutch is formed separately from the shaft and rotary drive and is not arranged between the shaft and rotary drive, and the drive unit is not disclosed to contain a worm gear (wheel 275 comprises a worm gear, but wheel 275 is not the disclosed drive unit). The prior art fails to disclose a propulsion system as claimed in Claims 6-10 and 16; therefore, Claims 6-10 and 16 contain allowable subject matter. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MICHAEL L SEHN whose telephone number is (571)270-3564. The examiner can normally be reached M-F 8:30 AM-6 PM, every other Friday off. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Courtney Heinle can be reached at 571-270-3508. 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. /MICHAEL L SEHN/Primary Examiner, Art Unit 3745
Read full office action

Prosecution Timeline

Show 2 earlier events
Apr 15, 2026
Response Filed
Jun 23, 2026
Final Rejection mailed — §102
Aug 17, 2026
Interview Requested
Aug 21, 2026
Response after Non-Final Action
Aug 25, 2026
Applicant Interview (Telephonic)
Sep 02, 2026
Non-Final Rejection mailed — §102
Sep 24, 2026
Examiner Interview Summary
Sep 24, 2026
Applicant Interview (Telephonic)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12709192
ALTERNATING CURRENT ZERO TORQUE RESISTANCE HEATING
3y 3m to grant Granted Aug 18, 2026
Patent 12710053
BLADELESS FANS WITH A NOZZLE
1y 5m to grant Granted Aug 18, 2026
Patent 12692794
Unknown
1y 9m to grant Granted Jul 28, 2026
Patent 12692839
High Capacity, Shallow Draft, Ocean-Borne Wind Turbine
1y 5m to grant Granted Jul 28, 2026
Patent 12692875
AXIAL FAN MOTOR
1y 1m to grant Granted Jul 28, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
81%
Grant Probability
94%
With Interview (+12.7%)
2y 9m (~3m remaining)
Median Time to Grant
High
PTA Risk
Based on 666 resolved cases by this examiner. Grant probability derived from career allowance 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