Prosecution Insights
Last updated: April 19, 2026
Application No. 18/310,275

Drive Mechanism for a Drug Delivery Device

Non-Final OA §DP
Filed
May 01, 2023
Examiner
CARPENTER, WILLIAM R
Art Unit
3783
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Terumo Corporation
OA Round
1 (Non-Final)
54%
Grant Probability
Moderate
1-2
OA Rounds
3y 7m
To Grant
99%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allow Rate
539 granted / 991 resolved
-15.6% vs TC avg
Strong +53% interview lift
Without
With
+53.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
63 currently pending
Career history
1054
Total Applications
across all art units

Statute-Specific Performance

§101
1.2%
-38.8% vs TC avg
§103
48.5%
+8.5% vs TC avg
§102
19.9%
-20.1% vs TC avg
§112
23.8%
-16.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 991 resolved cases

Office Action

§DP
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application is being examined under the pre-AIA first to invent provisions. 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. Claim(s) 15-31 rejected on the ground of nonstatutory double patenting as being unpatentable over claim(s) 1-10 of U.S. Patent No. 10,058,659 in view of U.S. Publication No. 2004/0260247 (“Veasey”) Regarding Claim 15, the reference patent claims (see Clm. 1): A drive mechanism for use in a drug delivery device, the drive mechanism comprising: A housing having a proximal end, a distal end, and an internal thread; A dose setting dial threadedly engaged with the internal thread and configured to simultaneously rotate and traverse axially towards the proximal end during dose setting and to simultaneously rotate and traverse axially towards the distal end during dose dispensing; A plunger rod rotatably fixed relative to the housing during dose setting and having a distal end configured to abut and move a cartridge piston during dose dispensing; An inner cylinder engaged with and positioned within the dose setting dial such that axial movement of the dose setting dial causes simultaneous axial movement of the inner cylinder; A clutch which releasably connects the dose setting dial and the inner cylinder; and A plunger rod holder rotatably fixed relative to the housing and coupled to the plunger rod to prevent the plunger rod from moving towards the proximal end during dose setting, wherein the plunger rod holder allows the plunger rod to move axially towards the distal end during dose dispensing. The reference patent fails to explicitly claim: The plunger rod is rotably fixed during both dose setting and dose dispensing; The plunger rod has a hollow portion; and A lead screw threadedly engaged with the threaded hollow portion of the plunger rod such that the lead screw can rotate relative to the plunger rod, where the inner cylinder is rotatably fixed relative to the lead screw. However, such nominal features are not sufficient to define and distinguish over the claims of the reference patent as they are notoriously well-known features in the prior art in association with this type of drive mechanism for an injection device. For example, Veasey discloses a drive mechanism for an injector having the same principle mode of operation as that claimed in the reference patent. Specifically, Veasey describes an injection drive mechanism which comprises a hollow plunger rod portion (18) which is rotatably fixed during both dose setting and dose dispensing (Par. 50, 52) with a lead screw (14) threadedly engaged with the threaded hollow portion of the plunger rod such that the lead screw can rotate relative to the plunger rod (Par. 55) with the lead screw releasably clutched to the dial sleeve (see at 18) via an element which is rotatably fixed relative to the lead screw such that when the clutch is activated the two components are rotationally slaved together, but when the clutch is disengaged the two components may rotate relative to one another (Par. 33). It would have been obvious for one having ordinary skill in the art at the time the invention was made to recite the claimed invention of the reference patent to include these common and well-known features, as disclosed by Veasey, since the clutchable lead screw received within the hollow interior of a threaded piston rod constitutes a notoriously well-known drive construction which allows for a telescopic arrangement to provide a maximal stroke length displacement in a known and predictable manner. Clm. 16 maps to Clm. 6. Clm. 17 maps to Clm. 8. Regarding Claim 18, this claim presents only a nominal feature indicating the shape of the hollow rod, wherein such a shape is well-known to the art (see Veasey) and clearly obvious to implement into the design of the claimed reference patent, see In re Dailey, 357 F.2d 669, 149 USPQ 47 (CCPA 1966). Regarding Claims 19-21, the “display window” is a well-known feature (see Veasey – Par. 57) obvious to include as part of the claimed reference patent in order to allow for clear visualization of the set dosage as a numerical value of dosed units. Regarding Claim 22, the reference patent fails to explicitly claim the “cartridge holder”, however, the inclusion of such a feature is nominal inasmuch as it is implicit to the reference in Clm. 1 of a “cartridge” to which the drive mechanism interfaces and is understood to be a known, obvious and well-known configuration (see Veasey) for automatic syringe injection systems to permit dosing of a medicament via a sealed reservoir to permit storage and dispensing of the medicament. As such, Claim 22 does not define or distinguish over the claims of the reference patent. Clm. 23-31 correspond to Clm. 16-21 discussed above and are therefore not distinguishing over the reference patent for the same reasons. Allowable Subject Matter Claim(s) 15-31 would be allowable over the prior art presuming proper satisfaction of the Double Patenting rejection by filing of a Terminal Disclaimer to U.S. Patent No. 10,058,659. The following is an examiner’s statement of reasons for indicating allowable subject matter: U.S. Publication No. 2004/0260247 (“Veasey”) and U.S. Publication No. 2006/0206057 (“DeRuntz”) constitute the closest analogous prior art which pertains to drug delivery devices having drive mechanism comprising telescoping plunger rods which are clutchably slaved to a rotatable dial sleeve in order to rotatably dial up a set dose and then dispense a dose product from the injector. However, the prior art fails to disclose, suggest, or otherwise obviate the specific combination of claimed features directed toward the manner in which the plunger rod is arranged a hollow rod and lead screw wherein the hollow plunger rod does not rotate during dose dispensing or dose setting, and wherein the lead screw is clutched to the dose setting dial via an inner cylinder which is rotatably fixed to the lead screw as presently claimed. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to WILLIAM R CARPENTER whose telephone number is (571)270-3637. The examiner can normally be reached Mon. to Thus. - 7:00AM to 5:00PM (EST/EDT). 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, KEVIN SIRMONS can be reached at (571) 272-4965. 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. /WILLIAM R CARPENTER/Primary Examiner, Art Unit 3783 11/19/2025
Read full office action

Prosecution Timeline

May 01, 2023
Application Filed
Nov 19, 2025
Non-Final Rejection — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12599753
INTRAVENOUS CATHETER ASSEMBLY
2y 5m to grant Granted Apr 14, 2026
Patent 12594409
SLEEVE FOR RETENTION OF A SURGICAL PORT COMPRISING FLANGES THAT ARE REVERSIBLY RADIALLY EXPANDABLE
2y 5m to grant Granted Apr 07, 2026
Patent 12576004
MASK
2y 5m to grant Granted Mar 17, 2026
Patent 12576255
ADJUSTABLE SEAL
2y 5m to grant Granted Mar 17, 2026
Patent 12569623
DRUG INJECTION CONTROL DEVICE HAVING STABLE OPERATION STRUCTURE OF INJECTION BUTTON THROUGH BUTTON PLATE POSITIONED IN DOSE DIAL
2y 5m to grant Granted Mar 10, 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
54%
Grant Probability
99%
With Interview (+53.3%)
3y 7m
Median Time to Grant
Low
PTA Risk
Based on 991 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