Prosecution Insights
Last updated: October 26, 2026

John P Zimmermann, USPTO Patent Examiner

Listed by the USPTO as ZIMMERMANN, JOHN P

Tech Center 2800 • Art Units: 1657 1733 2853 2861

This examiner grants 83% of resolved cases

Analysis

John P. Zimmermann is an examiner in Tech Center 2800 and Art Unit 1657 with 771 resolved cases. He demonstrates a high allowance rate of 82.7 percent. This efficiency is further reflected in a median days to allowance of 772. The 772-day median suggests a streamlined path for applicants seeking a grant in Art Unit 1657.

The interview lift of 19.5 percent indicates that even with a high baseline allowance rate, verbal advocacy remains a powerful tool. Top companies such as Seiko Epson Corporation, Canon Inc., and Ricoh Company, Ltd. are frequent participants in his prosecution pool. Firms like Spencer Fane LLP, CROWELL & MORING LLP, and Dority & Manning, P.A. and Seiko Epson have established experience managing the high-probability environment this examiner provides. Proactive engagement can help secure the 82.7 percent allowance rate more effectively.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

82.7%
Allow Rate
+14.7% vs TC avg
790
Total Applications
+19.5%
Interview Lift
772
Avg Prosecution Days
Based on 771 resolved cases, 2023–2026

Rejection Statute Breakdown

0.4%
§101 Eligibility
14.8%
§102 Novelty
77.1%
§103 Obviousness
4.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18977512 CONVEYING DEVICE AND RECORDING APPARATUS Non-Final OA CANON KABUSHIKI KAISHA
18957516 APPARATUS, METHOD, AND STORAGE MEDIUM Non-Final OA CANON KABUSHIKI KAISHA
19044845 LIQUID EJECTING DEVICE Non-Final OA SEIKO EPSON CORPORATION
19039372 LIQUID EJECTING APPARATUS, CONTROL METHOD FOR LIQUID EJECTING APPARATUS, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM STORING CONTROL PROGRAM FOR LIQUID EJECTING APPARATUS Non-Final OA SEIKO EPSON CORPORATION
18826369 EJECTION AMOUNT UPPER LIMIT VALUE DETERMINATION METHOD AND PRINTING DEVICE Final Rejection SEIKO EPSON CORPORATION
18786696 LIQUID EJECTION APPARATUS, LIQUID EJECTION HEAD, AND METHOD OF CONTROLLING LIQUID EJECTION HEAD Non-Final OA SEIKO EPSON CORPORATION
18616239 LIQUID EJECTING APPARATUS Final Rejection SEIKO EPSON CORPORATION
19051141 MAINTENANCE DEVICE AND INKJET RECORDING APPARATUS Non-Final OA KYOCERA Document Solutions Inc.
19023289 LIQUID DISCHARGE APPARATUS Non-Final OA RICOH COMPANY, LTD.

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner John P Zimmermann's allowance rate?

82.7% of resolved applications examined by John P Zimmermann were allowed (771 resolved cases), compared with 34.7% across Art Unit 1657 over the last five years.

Does an interview help with examiner John P Zimmermann?

This examiner's interview lift is +19.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner John P Zimmermann take to allow a patent?

Applications allowed by John P Zimmermann took 772 days on average from filing to allowance.

Which art unit does examiner John P Zimmermann work in?

John P Zimmermann examines applications in Art Unit 1657 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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