Prosecution Insights
Last updated: October 27, 2026

David W Berke-Schlessel, USPTO Patent Examiner

Listed by the USPTO as BERKE-SCHLESSEL, DAVID W

Tech Center 1700 • Art Units: 1638 1651 1653 1796 1799

This examiner grants 67% of resolved cases

Performance Statistics

66.8%
Allow Rate
+1.8% vs TC avg
814
Total Applications
+31.5%
Interview Lift
1048
Avg Prosecution Days
Based on 757 resolved cases, 2023–2026

Rejection Statute Breakdown

9.6%
§101 Eligibility
15.8%
§102 Novelty
37.8%
§103 Obviousness
25.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18609912 METHOD AND SYSTEM FOR DETERMINING INTEGRATED METABOLIC BASELINE AND POTENTIAL OF LIVING CELLS Final Rejection Agilent Technologies, Inc.
18027816 METHOD OF MANIPULATING ORGANISM AND DEVICE FOR MANIPULATING ORGANISM Non-Final OA NIKON CORPORATION
18286680 METHOD FOR DETECTING EXOPOLYSACCHARIDE Final Rejection MEIJI CO., LTD.
18706327 REAGENT COMPOSITION AND KIT Non-Final OA DENKA COMPANY LIMITED
18563900 DIAGNOSIS OF AUTISM SPECTRUM DISORDER BY MULTIOMICS PLATFORM Non-Final OA YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEM LTD.

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Frequently Asked Questions

What is examiner David W Berke-Schlessel's allowance rate?

66.8% of resolved applications examined by David W Berke-Schlessel were allowed (757 resolved cases), compared with 48.8% across Art Unit 1638 over the last five years.

Does an interview help with examiner David W Berke-Schlessel?

This examiner's interview lift is +31.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner David W Berke-Schlessel take to allow a patent?

Applications allowed by David W Berke-Schlessel took 1,048 days on average from filing to allowance.

Which art unit does examiner David W Berke-Schlessel work in?

David W Berke-Schlessel examines applications in Art Unit 1638 in Tech Center 1700 (Chemistry & Materials).

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