Prosecution Insights
Last updated: August 06, 2026
Application No. 18/952,121

HANDPIECE WITH ROTARY KNOB TO OPERATE THE TOOL HOLDER

Non-Final OA §112
Filed
Nov 19, 2024
Priority
Nov 24, 2023 — EU 23211879.4
Examiner
EIDE, HEIDI MARIE
Art Unit
3772
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
W&H Dentalwerk Bürmoos GmbH
OA Round
2 (Non-Final)
51%
Grant Probability
Moderate
2-3
OA Rounds
1y 8m
Est. Remaining
83%
With Interview

Examiner Intelligence

Grants 51% of resolved cases
51%
Career Allowance Rate
531 granted / 1050 resolved
-19.4% vs TC avg
Strong +32% interview lift
Without
With
+32.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
39 currently pending
Career history
1092
Total Applications
across all art units

Statute-Specific Performance

§101
2.7%
-37.3% vs TC avg
§103
43.7%
+3.7% vs TC avg
§102
14.1%
-25.9% vs TC avg
§112
32.6%
-7.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1050 resolved cases

Office Action

§112
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 . Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1-20 are 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(s) 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. Each of the independent claims has been amended to include the negative limitation including “movement of the rotary knob along the axis of rotation of the tool holder can only be achieved through rotation of the rotary knob about the axis of rotation”. It is noted that support for the negative limitation is not provided for in the originally filed specification. See MPEP 2179.05(i) regarding the requirements for a negative limitation needing support. Response to Arguments Applicant’s arguments with respect to the claim(s) 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. Allowable Subject Matter Claims 1-20 are allowed. The prior art fails to teach the claimed medical or dental handpiece comprising an actuating device provided on the head piece and acting on the tool holder, and a holding position, in which the treatment tool is held in the tool holder, wherein the actuating device comprises a link guide by which a rotary knob arranged on the head piece can be moved along the axis of rotation relative to the tool holder in such a way that, when the rotary knob is moved towards the tool holder, the tool holder is moved into the receive/release position, and when the rotary knob is moved away from the tool holder, the tool holder is moved into the holding position, wherein movement of the rotary knob along the axis of rotation of the tool holder can only be achieved through rotation of the rotary knob about the axis of rotation in combination with the other claimed limitations. It is noted that the closed prior art of Garcia teaches movement of the rotary knob along the rotation axis by pressing it downwards as discussed in par. 33 of the translation. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. 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 HEIDI MARIE EIDE whose telephone number is (571)270-3081. The examiner can normally be reached Mon-Fri 9:00-4:00. 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, Edelmira Bosques can be reached at 571-270-5614. 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. /HEIDI M EIDE/Primary Examiner, Art Unit 3772 6/11/2026
Read full office action

Prosecution Timeline

Nov 19, 2024
Application Filed
Feb 26, 2026
Non-Final Rejection mailed — §112
May 19, 2026
Response Filed
Jun 16, 2026
Final Rejection mailed — §112
Jul 16, 2026
Response after Non-Final Action

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12678265
CERAMIC DENTAL IMPLANT
3y 1m to grant Granted Jul 14, 2026
Patent 12642622
ENDODONTIC DRIVING AND OPERATING DEVICE
2y 12m to grant Granted Jun 02, 2026
Patent 12636019
BONE DRILL BIT AND HANDPIECE FOR USING THE BONE DRILL BIT
5y 11m to grant Granted May 26, 2026
Patent 12605228
DENTAL HANDPIECE
2y 10m to grant Granted Apr 21, 2026
Patent 12599462
DEVICE FOR MAKING, DUPLICATING AND FIXING DENTAL MODELS IN ARTICULATOR
3y 2m to grant Granted Apr 14, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
51%
Grant Probability
83%
With Interview (+32.5%)
3y 4m (~1y 8m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1050 resolved cases by this examiner. Grant probability derived from career allowance rate.

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