Prosecution Insights
Last updated: July 17, 2026
Application No. 18/903,590

MANUFACTURING PROCESS FOR HOLLOW PLUNGER ROD

Non-Final OA §112
Filed
Oct 01, 2024
Priority
Mar 08, 2021 — provisional 63/158,165 +1 more
Examiner
LEE, EDMUND H
Art Unit
1744
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Amgen Inc.
OA Round
1 (Non-Final)
69%
Grant Probability
Favorable
1-2
OA Rounds
1y 3m
Est. Remaining
87%
With Interview

Examiner Intelligence

Grants 69% — above average
69%
Career Allowance Rate
803 granted / 1157 resolved
+4.4% vs TC avg
Strong +18% interview lift
Without
With
+17.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
40 currently pending
Career history
1195
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
74.7%
+34.7% vs TC avg
§102
6.3%
-33.7% vs TC avg
§112
14.7%
-25.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1157 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 15 is 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. The phrase “the hanger” (cl 15:4) lacks antecedent basis in the claim. Correction is required. Claims 1-4,6-7,10-11,13-14,16-17, 41,43, and 46-50 are allowed. Claim 15 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. The following is an examiner’s statement of reasons for allowance: the prior art of record including the closest prior art Young et al (USP2015/0174331) teaches a stamping a metal shaft 42 and then overmolding a plunger engagement member 44 onto an end of the metal shaft 42. However, Young et al neither teaches nor renders obvious every claimed limitation including a stamping machine having an inlet, an outlet, and a travel path extending between the inlet and the outlet; activating the stamping machine to advance the blank of sheet metal along the travel path of the stamping machine, the travel path including a plurality of stages configured to process the blank of sheet metal into a plurality of plunger bodies, each of the plunger bodies including an inner wall defining an axial chamber, an outer wall, a first end, and a second end opposite the first end; forming the plurality of plunger bodies from the blank of sheet metal as the blank of sheet metal passes through the travel path and exits the outlet; separating each of the plurality of plunger bodies from the blank of sheet metal; loading at least one of the plurality of plunger bodies into a cavity of a molding tool of a molding system; and injecting molten plastic into a plurality of channels of the molding tool to form an overmolded plunger body. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. USP 2015/0174331 teaches blanking a metal sheet and molding a plunger body onto the plunger rod); and USP2006/0089602 teaches injection molding of a plunger but no blanking/stamping. Any inquiry concerning this communication or earlier communications from the examiner should be directed to EDMUND H LEE whose telephone number is (571)272-1204. The examiner can normally be reached M-Th 9AM-4PM. 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, Xiao (Sam) Zhao can be reached at 571-270-5343. 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. EHL /EDMUND H LEE/Primary Examiner, Art Unit 1744
Read full office action

Prosecution Timeline

Oct 01, 2024
Application Filed
May 27, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12668022
THREE-DIMENSIONAL PRINTING
3y 2m to grant Granted Jun 30, 2026
Patent 12661844
INSERT FOR VACUUM FORMING
2y 3m to grant Granted Jun 23, 2026
Patent 12654359
CONTROL METHOD FOR 3D PRINTER FOR CONSTRUCTION
1y 9m to grant Granted Jun 16, 2026
Patent 12651682
CONDUCTIVE MEMBER AND PRODUCTION METHOD THEREOF
2y 6m to grant Granted Jun 09, 2026
Patent 12643299
METHOD OF MANUFACTURING FLUID-FILLED CHAMBERS
1y 11m to grant Granted Jun 02, 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
69%
Grant Probability
87%
With Interview (+17.8%)
3y 0m (~1y 3m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1157 resolved cases by this examiner. Grant probability derived from career allowance rate.

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