Prosecution Insights
Last updated: October 26, 2026

Andrew D Kosar, USPTO Patent Examiner

Listed by the USPTO as KOSAR, ANDREW D

Tech Center 1600 • Art Units: 1600 1622 1625 1654

This examiner grants 42% of resolved cases

Analysis

Andrew D. Kosar serves in Tech Center 1600 and Art Unit 1600, where he has 270 resolved cases. His allowance rate of 41.9% and median days to allowance of 1269 suggest the prosecution environment for applicants. Companies like Syngenta AG, Shionogi & Co., Ltd., and Tohoku University are among the top applicants in his docket. The 1269-day median indicates the time successful cases typically take to reach a grant. The 41.9% allowance rate serves as a baseline for success in Art Unit 1600.

The profile features an interview lift of 31.9%. This 31.9% lift suggests that conducting an interview is a factor in securing an allowance, as it improves the 41.9% base rate. Firms such as FOLEY & LARDNER LLP, BakerHostetler, and Barron & Young PLLC should prioritize interviews to leverage this lift. With 270 resolved cases, the data supports the use of direct communication to overcome hurdles. The 1269-day median pendency remains a key benchmark for applicants in this tech center.

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

Performance Statistics

41.9%
Allow Rate
-18.1% vs TC avg
313
Total Applications
+31.9%
Interview Lift
1269
Avg Prosecution Days
Based on 270 resolved cases, 2023–2026

Rejection Statute Breakdown

3.6%
§101 Eligibility
20.7%
§102 Novelty
27.3%
§103 Obviousness
30.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18842578 PYRIMIDINLY-OXY-QUINOLINE BASED HERBICIDAL COMPOUNDS Non-Final OA SYNGENTA CROP PROTECTION AG

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 Andrew D Kosar's allowance rate?

41.9% of resolved applications examined by Andrew D Kosar were allowed (270 resolved cases), compared with 37.3% across Art Unit 1600 over the last five years.

Does an interview help with examiner Andrew D Kosar?

This examiner's interview lift is +31.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Andrew D Kosar take to allow a patent?

Applications allowed by Andrew D Kosar took 1,269 days on average from filing to allowance.

Which art unit does examiner Andrew D Kosar work in?

Andrew D Kosar examines applications in Art Unit 1600 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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