Prosecution Insights
Last updated: October 25, 2026

Daniel E Kolker, USPTO Patent Examiner

Listed by the USPTO as KOLKER, DANIEL E

Tech Center 1600 • Art Units: 1644 1645 1649

This examiner grants 50% of resolved cases

Analysis

Daniel E. Kolker has resolved 243 cases in Art Unit 1644 in Tech Center 1600. The allowance rate stands at 49.8 percent, which is nearly an even split between grants and abandonments. The median days to allowance is 1410, reflecting the typically long timelines associated with biotechnology and chemical prosecution.

The most striking figure is the interview lift of 64.1 percent. This suggests that interviews are an essential tool for success with this examiner, providing a massive boost to the baseline 49.8 percent allowance rate. Practitioners should prioritize early and frequent communication to navigate the 1410 day median pendency effectively.

Instil Bio (Uk) Limited is a primary applicant, with Knobbe, Martens, Olson & Bear, LLP serving as the top firm. These practitioners likely utilize the 64.1 percent interview lift to overcome the challenges of the 1600 Tech Center. The data emphasizes that personal engagement is the most productive path toward a grant with this examiner.

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

Performance Statistics

49.8%
Allow Rate
-10.2% vs TC avg
244
Total Applications
+64.1%
Interview Lift
1410
Avg Prosecution Days
Based on 243 resolved cases, 2023–2026

Rejection Statute Breakdown

3.7%
§101 Eligibility
21.2%
§102 Novelty
32.6%
§103 Obviousness
26.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17843480 RECEPTORS PROVIDING TARGETED COSTIMULATION FOR ADOPTIVE CELL THERAPY Final Rejection INSTIL BIO (UK) LIMITED

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Frequently Asked Questions

What is examiner Daniel E Kolker's allowance rate?

49.8% of resolved applications examined by Daniel E Kolker were allowed (243 resolved cases), compared with 35.9% across Art Unit 1644 over the last five years.

Does an interview help with examiner Daniel E Kolker?

This examiner's interview lift is +64.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Daniel E Kolker take to allow a patent?

Applications allowed by Daniel E Kolker took 1,410 days on average from filing to allowance.

Which art unit does examiner Daniel E Kolker work in?

Daniel E Kolker examines applications in Art Unit 1644 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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