Prosecution Insights
Last updated: August 06, 2026
Application No. 18/696,285

SHAFT COUPLING AND COMMINUTING DEVICE HAVING SUCH A SHAFT COUPLING

Final Rejection §102§103§112
Filed
Mar 27, 2024
Priority
Sep 27, 2021 — EU 21199036.1 +1 more
Examiner
BINDA, GREGORY JOHN
Art Unit
3679
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Manuel Lindner
OA Round
2 (Final)
81%
Grant Probability
Favorable
3-4
OA Rounds
1m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
1474 granted / 1821 resolved
+28.9% vs TC avg
Moderate +12% lift
Without
With
+11.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
53 currently pending
Career history
1849
Total Applications
across all art units

Statute-Specific Performance

§101
2.4%
-37.6% vs TC avg
§103
19.5%
-20.5% vs TC avg
§102
38.2%
-1.8% vs TC avg
§112
37.8%
-2.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1821 resolved cases

Office Action

§102 §103 §112
Drawings The replacement drawings filed June 12, 2026 are objected to as failing to comply with 37 CFR 1.84(p)(5) because they include the following reference character(s) not mentioned in the description: P. Corrected drawing sheets in compliance with 37 CFR 1.121(d), or amendment to the specification to add the reference character(s) in the description in compliance with 37 CFR 1.121(b) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Claim Rejections - 35 USC § 112 Claim 3 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 3 recites, “an elastic material is provided in the first and/or second recesses [with play].” There is no description of such a combination of features in the application as originally filed. In the specification as originally filed (see page 7, lines 16-17) such play is eliminated when elastic material is provided. Claim Rejections - 35 USC § 102 Claims 1-6 & 8-9 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Schonstedt, US 2,724,250. Claims 1 & 2. Figs. 1-6 show a shaft coupling device comprising: a first shaft hub (26) of a first shaft (11), the first shaft hub having a plurality of first receiving units/recesses (30); a second shaft hub (38) of a second shaft (13), the second shaft hub having a plurality of second receiving units/recesses (44); a plurality of connection elements (45) for connecting the first and second shaft hubs to each other; and wherein the plurality of first receiving units are arranged at a distance (see Fig. 4) from each other along the circumference of the first shaft hub, and the plurality of second receiving units are arranged at a distance (see Fig. 5) from each other along the circumference of the second shaft hub, and the plurality of first receiving units (30) are configured such that the plurality of connection elements (45) can be releasably fitted into the plurality of first receiving units with play (see also col. 2, lines 69-72). Claim 3. At col. 4, line 27, Schonstedt discloses the connection elements (45) are flexible, i.e. made of elastic material. As such Figs. 1-6 show elastic material (45) is provided in the first and second recesses (30 & 44). Claim 4. Figs 1-6 show the plurality of first and second receiving units (30 & 44) are configured such that the plurality of connection elements (45) can be releasably fitted in an exclusively radial direction of movement and can be released from the first and second shaft hubs (26 & 38) exclusively in a radial direction of movement. Claim 5. Figs. 1-6 show the plurality of connection elements (45) can be fitted into both one of the plurality of first receiving units (30) and one of the plurality of second receiving units (44). Claim 6. Figs. 1-6 show the first shaft hub (26) and the second shaft hub (38) are rotationally symmetrical. Claim 8. Figs. 1-3 & 5-6 show fastening means (47) configured to secure the plurality of connection elements (45) in the plurality of second receiving units (44). Claim 9. Figs. 1-3 & 5-6 show the fastening means (47) comprises screws (col. 2, line 63). In the reply filed June 12, 2026, applicant argues that Schonstedt doesn’t disclose play. However, Schonstedt discloses that there can be play. Namely, there would play if the fingers 45 weren’t bent as disclosed at col. 2, lines 69-72, and thus there “can be” play as recited in claim 1. Claim Rejections - 35 USC § 103 Claim 7 is rejected under 35 U.S.C. 103 as being unpatentable over Schonstedt. Schonstedt discloses a plurality of connection elements (45), but does not expressly disclose they are cuboidal in shape. However, it would have been an obvious matter of design choice to make the plurality of connection elements (45) cuboidal in shape, since such a modification would have involved a mere change in the shape of the connection elements. A change in shape is generally recognized as being within the level of ordinary skill in the art. In re Dailey, 357 F.2d 669, 149 USPQ 47 (CCPA 1966). Claims 12-13 are rejected under 35 U.S.C. 103 as being unpatentable over Morton, US 3,342,425 in view of Schonstedt. At Figs. 1-3, Morton shows a multi-shaft comminuting device comprising: a material receiving space (15); a first shaft, in particular a drive shaft (47); a second shaft, in particular a rotor shaft (44, 45) arranged in the material receiving space; and a shaft coupling device (48) for connecting the drive shaft to the rotor shaft. Morton does not expressly disclose the shaft coupling device (48) comprises all the features of instant claim 1. At col. 1, lines 48-53, Schonstedt teaches a making a shaft coupling device comprising all the features of instant claim 1 in order to provide a coupling where bending or flexing of the coupled shafts is avoided and in which slight axial misalignment of the coupled shafts is compensated for. It would have been obvious to one of ordinary skill in the art to modify the comminuting device of Morton by making its shaft coupling device with all the features of instant claim 1 in order to provide a coupling where bending or flexing of the coupled shafts is avoided and in which slight axial misalignment of the coupled shafts is compensated for as taught by Schonstedt. Allowable Subject Matter Claim 14 is allowed. 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 Greg Binda whose telephone number is (571)272-7077. The examiner can normally be reached 9:30-5:30 et. 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, Matthew Troutman can be reached at 571-270-3654. 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. /Greg Binda/Primary Examiner, Art Unit 3679
Read full office action

Prosecution Timeline

Mar 27, 2024
Application Filed
Mar 12, 2026
Non-Final Rejection mailed — §102, §103, §112
Jun 12, 2026
Response Filed
Jun 29, 2026
Final Rejection mailed — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12698795
ROTOR SHAFT SYSTEM WITH INCREASED STIFFNESS
2y 9m to grant Granted Aug 04, 2026
Patent 12692904
TRIPOD TYPE CONSTANT VELOCITY UNIVERSAL JOINT
2y 10m to grant Granted Jul 28, 2026
Patent 12692905
UNIVERSAL JOINT
2y 8m to grant Granted Jul 28, 2026
Patent 12692906
PROPELLER SHAFT YOKE AND PROPELLER SHAFT
2y 10m to grant Granted Jul 28, 2026
Patent 12687202
CONSTANT VELOCITY JOINT
2y 4m to grant Granted Jul 21, 2026
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
81%
Grant Probability
93%
With Interview (+11.8%)
2y 6m (~1m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1821 resolved cases by this examiner. Grant probability derived from career allowance rate.

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