Prosecution Insights
Last updated: April 19, 2026
Application No. 17/843,566

PRIMING INSTRUMENT FOR MEDICAL DEVICE, MEDICAL DEVICE SYSTEM, AND METHOD FOR PRIMING MEDICAL DEVICE

Non-Final OA §102§103
Filed
Jun 17, 2022
Examiner
PRICE, NATHAN R
Art Unit
3783
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Terumo Kabushiki Kaisha
OA Round
1 (Non-Final)
52%
Grant Probability
Moderate
1-2
OA Rounds
4y 4m
To Grant
92%
With Interview

Examiner Intelligence

Grants 52% of resolved cases
52%
Career Allow Rate
261 granted / 498 resolved
-17.6% vs TC avg
Strong +39% interview lift
Without
With
+39.3%
Interview Lift
resolved cases with interview
Typical timeline
4y 4m
Avg Prosecution
50 currently pending
Career history
548
Total Applications
across all art units

Statute-Specific Performance

§101
1.2%
-38.8% vs TC avg
§103
39.6%
-0.4% vs TC avg
§102
31.4%
-8.6% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 498 resolved cases

Office Action

§102 §103
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 . Election/Restrictions Applicant’s election without traverse of Group II and Species A, corresponding to claims 17-20, in the reply filed on 10/21/25 is acknowledged. Claims 1-16 are withdrawn from consideration. 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) 17 and 20 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Chiba et al. (WO 2015147173). Regarding claim 17, Chiba et al. discloses a method for priming a medical device 1 (see fig. 7) including a liquid delivering lumen (internal space of inner needle 2) having a first opening portion 2b and a discharge lumen (internal space of outer needle 3) having a second opening portion 17, the method comprising: inserting a distal portion of the medical device from an insertion port 6c of an instrument body 6 (see fig. 7) and disposing the first opening portion and the second opening portion of the medical device in a hollow portion of the instrument body (see fig. 7); sealing an inside of the hollow portion with a sealing portion provided in the insertion port of the instrument body (using threaded connection between 6c and 15; see fig. 7); and injecting a fluid into the liquid delivering lumen from a proximal side, causing the fluid to flow into the hollow portion from the first opening portion of the liquid delivering lumen into which the fluid is injected, and causing the fluid to flow into the discharge lumen from the hollow portion via the second opening portion to fill the liquid delivering lumen and the discharge lumen with the fluid (process described on pg. 7-8 of the translated specification). Regarding claim 20, Chiba et al. discloses the distal portion of the hollow portion of the priming instrument facing a distal portion of the medical device has a concave curved surface shape (see at least the portion of the surface that transitions into the corners of the distal, inwardly facing surface of 6 in fig. 7). Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claim(s) 18 is/are rejected under 35 U.S.C. 103 as being unpatentable over Chiba et al. in view of Sinelnikov et al. (US 20150257779). Regarding claim 18, Chiba et al. discloses the method as claimed, except for the medical device including a guidewire lumen having a third opening portion, inserting the third opening portion into the hollow portion, and causing fluid to flow into the guidewire lumen from the hollow portion via the third opening portion as claimed. However, Sinelnikov et al. teaches inclusion of, and priming of, a guidewire lumen in a medical device (par. 0187). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the method of Chiba et al. to utilize a guidewire lumen, as taught by Sinelnikov et al., for the purpose of providing sufficient structure for accurate placement of the medical device within the patient. It would further have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to utilize the methodology of Chiba et al. to prime the guidewire lumen in the same way as the discharge lumen is primed, since Sinelnikov et al. teaches priming the guidewire lumen, and in order to prime multiple lumens simultaneously to create a fully primed closed circuit, as desired by Chiba et al. (see pg. 7-8 of the translated specification). Claim(s) 19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Chiba et al. in view of Brugger et al. (US 20030010717). Regarding claim 19, Chiba et al. discloses the method as claimed, except for providing a filter at the distal portion of the hollow portion, and allowing air and fluid to pass therethrough. However, Brugger et al. teaches utilizing a filter 32 at the end of a priming device (see fig. 3B), the filter allowing air and fluid to pass therethrough (see fig. 3B). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the hollow portion of Chiba et al. to utilize a filter, as taught by Brugger et al., for the purpose of separating air from fluid within the fluid circuit (see fig. 3B; par. 0048). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: Ludt et al. (US 6454736) - end cap structure with seal and filter, see fig. 2 Childers et al. (US 20040019312) - cap for priming a multi-lumen device out of one lumen and into the other; see fig. 2 Further references provided in the attached notice of references cited Any inquiry concerning this communication or earlier communications from the examiner should be directed to NATHAN R PRICE whose telephone number is (571)270-5421. The examiner can normally be reached Mon-Fri 8:00am-4:00pm Eastern time. 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, Michael Tsai can be reached at 571-270-5246. 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. /NATHAN R PRICE/Primary Examiner, Art Unit 3783
Read full office action

Prosecution Timeline

Jun 17, 2022
Application Filed
Feb 18, 2026
Non-Final Rejection — §102, §103 (current)

Precedent Cases

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2y 5m to grant Granted Apr 07, 2026
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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
52%
Grant Probability
92%
With Interview (+39.3%)
4y 4m
Median Time to Grant
Low
PTA Risk
Based on 498 resolved cases by this examiner. Grant probability derived from career allow rate.

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