Prosecution Insights
Last updated: April 19, 2026
Application No. 18/547,961

INJECTOR APPARATUS FACILITATING AUTOMATIC CANNULA WITHDRAWAL

Non-Final OA §112
Filed
Aug 25, 2023
Examiner
KIM, SUN U
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Owen Mumford Limited
OA Round
1 (Non-Final)
78%
Grant Probability
Favorable
1-2
OA Rounds
2y 11m
To Grant
90%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allow Rate
747 granted / 954 resolved
+13.3% vs TC avg
Moderate +11% lift
Without
With
+11.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
31 currently pending
Career history
985
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
47.2%
+7.2% vs TC avg
§102
21.6%
-18.4% vs TC avg
§112
17.5%
-22.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 954 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 Objections Claims 30 and 34 are objected to because of the following informalities: Recitation of “and” in line 1 of claims 30 and 34 should be deleted. Appropriate correction is required. 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 22, 28 and 30 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. Recitations of “said one or more radially moveable fingers” in line 19 of claim 22, “said first or said second predefined distance” in bridging lines 2-3 of claim 28 and “the piston” in line 5 of claim 30 lack positive antecedent basis. Allowable Subject Matter Claim 22 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. Claims 28 and 30 would be allowable if rewritten 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 and to include all of the limitations of the base claim and any intervening claims. Claims 23-27, 29 and 31-34 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: WO 94/21316 to Marshall et al. (hereinafter “Marshall”) is considered the closest prior art to an injector of claim 1. Marshall teaches an injector (see Fig.1 - device) for use with a primary package (Fig.1- capsule 4) comprising a cannula component (Fig.1 - needle 5) and a body containing a medicament and a bung (Fig.1 - piston 14) located within the body, the injector comprising: a substantially cylindrical proximal component configured to accommodate said cannula component and at least a part of said body (Fig.1 - cylindrical barrel 1 with nose piece 3); a substantially cylindrical distal component for telescopic engagement with said proximal component (Fig.1 - elongate cylindrical cap 2), the distal component having a distal end wall (see Fig.1 - end wall of a cap 2) and a member extending axially from said distal end wall into a central region of the distal component (see Fig.1 - annular wall of a cap 2); and the injector being configured such that a force applied to telescope the proximal and distal components together causes a plunger (see Fig. 1 - 15) to: push the primary package or syringe components through the proximal component and thereby cause a cannula of the cannula component to project from the proximal component (page 6, line 28 – page 7, line 13); thereafter drive the bung through the body of the cartridge or syringe body to eject medication through the cannula component (page 7, lines 14-17); and thereafter disengage the plunger from the distal component to allow the entire primary package or syringe, together with the plunger, to be moved through the injector in a distal direction and thereby withdraw the cannula entirely into the proximal component (page 7, lines 19-22), wherein said plunger comprises two or more flexible fingers (Fig.1 - fingers 16) extending in a substantially axial direction and the other of said member and said plunger comprises engagement features for engaging with said fingers (Fig.1 - formation 18) (see figures 1-2, 6, 7-9; page 5, line 12 – page 7, line 28). However, Marshall does not teach or suggest the injector of claim 1 comprising a plunger releasably engaged within said distal component for engagement with said bung, one or more radially moveable fingers being coupled to one or more respective flexible arms extending substantially axially through the cylindrical housing of the distal component from a distal end of the housing;  a feature or features provided in or on said plunger for engagement with the one or more radially moveable fingers to facilitate said releasable engagement of the plunger with the distal component; and  a restraining component located within the distal component, the restraining component being movable in a distal direction within the distal component from an initial pre-injection position in which it restrains said fingers from radially outward movement to a post-injection position in which is does not restrain said fingers from radially outward movement. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN KIM whose telephone number is (571)272-1142. The examiner can normally be reached Maxi Flex. 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, IN SUK BULLOCK can be reached at 571-272-5954. 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. /John Kim/Primary Examiner, Art Unit 1777 JK 1/24/26
Read full office action

Prosecution Timeline

Aug 25, 2023
Application Filed
Feb 22, 2024
Response after Non-Final Action
Jan 24, 2026
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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DEVICES FOR PERITONEAL DIALYSATE ANALYSIS
2y 5m to grant Granted Apr 14, 2026
Patent 12594368
PERITONEAL DIALYSIS SYSTEM USING DISINFECTION
2y 5m to grant Granted Apr 07, 2026
Patent 12594367
A SYSTEM AND METHOD FOR PRODUCING FLUID FOR PERITONEAL DIALYSIS
2y 5m to grant Granted Apr 07, 2026
Patent 12594369
WEIGHT-BASED PERITONEAL DIALYSIS SYSTEM INCLUDING A DRAIN TROLLEY
2y 5m to grant Granted Apr 07, 2026
Patent 12589192
PORTABLE DIALYSIS SYSTEM
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
90%
With Interview (+11.2%)
2y 11m
Median Time to Grant
Low
PTA Risk
Based on 954 resolved cases by this examiner. Grant probability derived from career allow rate.

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