Prosecution Insights
Last updated: April 19, 2026
Application No. 18/787,844

LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE METHOD

Non-Final OA §DP
Filed
Jul 29, 2024
Examiner
MRUK, GEOFFREY S
Art Unit
2853
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Canon Kabushiki Kaisha
OA Round
1 (Non-Final)
92%
Grant Probability
Favorable
1-2
OA Rounds
2y 2m
To Grant
95%
With Interview

Examiner Intelligence

Grants 92% — above average
92%
Career Allow Rate
1062 granted / 1152 resolved
+24.2% vs TC avg
Minimal +3% lift
Without
With
+3.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 2m
Avg Prosecution
18 currently pending
Career history
1170
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
66.7%
+26.7% vs TC avg
§102
14.5%
-25.5% vs TC avg
§112
5.7%
-34.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1152 resolved cases

Office Action

§DP
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 . Priority Acknowledgment is made of applicant’s claim for foreign priority under 35 U.S.C. 119 (a)-(d). The certified copy has been filed in parent Application No. 15/394,639, filed on 29 December 2016. Drawings The drawings received on 29 July 2024 are accepted. Specification 1. The disclosure is objected to because of the following informalities: at page 1, paragraph 0000, United States Patent Application No. 18/310,454 is now United States Patent No. 12,064,975. 2. The specification has not been checked to the extent necessary to determine the presence of all possible minor errors. Applicant’s cooperation is requested in correcting any errors of which applicant may become aware in the specification. Appropriate correction is required. Examiner’s Note The examiner has pointed out particular references contained in the prior art of record in the body of this action for the convenience of the applicant. Although the specified citations are representative of the teachings in the art and are applied to the specific limitations within the individual claim, other passages and figures may apply as well. Applicant should consider the entire prior art as applicable as to the limitations of the claims. It is respectfully requested from the applicant, in preparing the response, to consider fully the entire references as potentially teaching all or part of the claimed invention, as well as the context of the passage as taught by the prior art or disclosed by the examiner. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. 1. Claims 1-6 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1, 2, 4, and 16 of U.S. Patent No. 10,336,091. Although the claims at issue are not identical, they are not patentably distinct from each other because U.S. Patent No. 10,336,091 claims a similar liquid discharge head. The instant claims are broader in scope than the claims in U.S. Patent No. 10,336,091 because the instant claims remove elements such as the “first liquid channel”, “second liquid channel”, and the “control system”. It would have been obvious to one of ordinary skill in the art since the removal of these elements does not alter the device of the invention as a whole. 2. Claims 1-6 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-4 and 11 of U.S. Patent No. 12,064,975. Although the claims at issue are not identical, they are not patentably distinct from each other because U.S. Patent No. 12,064,975 claims a similar liquid discharge head. The instant claims are broader in scope than the claims in U.S. Patent No. 12,064,975 because the instant claims remove the limitation “the pressure at the inlet portion is higher than the pressure at the outlet portion”. It would have been obvious to one of ordinary skill in the art since the removal of this limitation does not alter the device of the invention as a whole. Conclusion In view of the foregoing, the above claims have failed to patentably distinguish over the applied art. The remaining references listed on forms 892 and 1449 have been reviewed by the examiner and are considered to be cumulative to or less material than the prior art references relied upon in the rejection above. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Geoffrey Mruk whose telephone number is (571)272-2810. The examiner can normally be reached M-F 8-4:30 PM. 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, Ricardo Magallanes can be reached at (571) 272-5960. 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. /GEOFFREY S MRUK/Primary Examiner, Art Unit 2853 01/28/2026
Read full office action

Prosecution Timeline

Jul 29, 2024
Application Filed
Sep 20, 2024
Response after Non-Final Action
Jan 28, 2026
Non-Final Rejection — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12594761
LIQUID EJECTION HEAD AND PRINTING APPARATUS
2y 5m to grant Granted Apr 07, 2026
Patent 12589595
LIQUID DISCHARGE APPARATUS AND STORAGE DEVICE
2y 5m to grant Granted Mar 31, 2026
Patent 12589590
Liquid Ejecting Head And Liquid Ejecting Apparatus
2y 5m to grant Granted Mar 31, 2026
Patent 12589604
LIQUID EJECTION HEAD, METHOD OF DETACHING PROTECTION MEMBER FROM LIQUID EJECTION HEAD, AND LIQUID EJECTION APPARATUS
2y 5m to grant Granted Mar 31, 2026
Patent 12589591
LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS
2y 5m to grant Granted Mar 31, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
92%
Grant Probability
95%
With Interview (+3.0%)
2y 2m
Median Time to Grant
Low
PTA Risk
Based on 1152 resolved cases by this examiner. Grant probability derived from career allow 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