Prosecution Insights
Last updated: April 19, 2026
Application No. 18/877,414

ROOT CANAL CLEANING DEVICE

Non-Final OA §112
Filed
Dec 20, 2024
Examiner
LUCCHESI, NICHOLAS D
Art Unit
3772
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Endentics Co. Ltd.
OA Round
1 (Non-Final)
78%
Grant Probability
Favorable
1-2
OA Rounds
2y 9m
To Grant
88%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allow Rate
623 granted / 794 resolved
+8.5% vs TC avg
Moderate +9% lift
Without
With
+9.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
52 currently pending
Career history
846
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
32.9%
-7.1% vs TC avg
§102
28.4%
-11.6% vs TC avg
§112
31.0%
-9.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 794 resolved cases

Office Action

§112
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 . Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-14 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. In claim 1, line 3, “the electrical input” has no prior antecedent basis. It appears that “the” should be changed to –a--. In claim 1, lines 15 and 16, “and target contaminants inside the tooth including the root canal is removed” is unclear. It appears that this should be amended to read –and target contaminants inside a tooth including the root canal which are removed--. In claim 1, line 17, “on a tooth” is unclear if this is referring to the tooth in line 16. It appears that “a” should be –the--. In claim 5, lines 3 and 4, “the ultrasonic waves” has no prior antecedent basis. In claim 6, line 3, “the cross section” has no prior antecedent basis and is unclear as to which cross section is being referred to. In claim 11, lines 3 and 4, “the ultrasonic waves” has no prior antecedent basis. In claim 12, line 3, “the cross section” has no prior antecedent basis and is unclear as to which cross section is being referred to. Allowable Subject Matter Claims 1-14 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: The claims in this application have not been rejected with prior art because the prior art of record does not disclose a root canal cleaning device comprising all of the elements in claim 1. The closest prior art of record appears to be the reference to Khakpour et al 20210386532, which shows a tooth cleaning device that utilizes pressure waves in a medium to clean a tooth/root canal, but does not disclose ultrasonic acoustic pressure applied to a coolant, and then transferred to a cleaning solution including a degassed liquid to generate vapor bubbles in the cleaning solution so that both the cleaning solution and vapor bubbles target and remove contaminants in the tooth and root canal. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Any inquiry concerning this communication or earlier communications from the examiner should be directed to NICHOLAS D LUCCHESI whose telephone number is (571)272-4977. The examiner can normally be reached M-F 800-430. 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, Eric Rosen can be reached at 571-270-7855. 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. /NICHOLAS D LUCCHESI/Primary Examiner, Art Unit 3772
Read full office action

Prosecution Timeline

Dec 20, 2024
Application Filed
Feb 13, 2026
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12599467
MANDIBULAR OPENING AND ADVANCEMENT MEASUREMENT AND POSITIONING DEVICE
2y 5m to grant Granted Apr 14, 2026
Patent 12599461
IMPRESSION TRAY
2y 5m to grant Granted Apr 14, 2026
Patent 12594103
MODULAR BONE SCREW FOR SURGICAL FIXATION TO BONE
2y 5m to grant Granted Apr 07, 2026
Patent 12594152
DENTAL FLOSSING DEVICE
2y 5m to grant Granted Apr 07, 2026
Patent 12588970
SURGICAL GUIDE WITH MATING CONNECTORS
2y 5m to grant Granted Mar 31, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
78%
Grant Probability
88%
With Interview (+9.1%)
2y 9m
Median Time to Grant
Low
PTA Risk
Based on 794 resolved cases by this examiner. Grant probability derived from career allow rate.

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