Prosecution Insights
Last updated: August 18, 2026

Examiner: BERKE-SCHLESSEL, DAVID W

Tech Center 1700 • Art Units: 1638 1651 1653 1799

This examiner grants 67% of resolved cases

Performance Statistics

66.6%
Allow Rate
+1.6% vs TC avg
791
Total Applications
+31.9%
Interview Lift
1047
Avg Prosecution Days
Based on 746 resolved cases, 2023–2026

Rejection Statute Breakdown

9.5%
§101 Eligibility
15.8%
§102 Novelty
37.9%
§103 Obviousness
24.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18570470 CHITINOLYTIC ENZYME-BASED PLANT PROTECTION AGENTS Non-Final OA FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
18437633 NON-PROTEIN CLOSTRIDIAL TOXIN COMPOSITIONS Non-Final OA Allergan, Inc.
18775316 TUMORICIDAL AND ANTIMICROBIAL COMPOSITIONS AND METHODS Non-Final OA ImmunityBio, Inc.
18293972 CHOLINE ACETYLTRANSFERASE AS A THERAPY FOR ENDOTOXEMIA, SEPSIS, COLITIS AND INFLAMMATORY DISEASES Non-Final OA The Feinstein Institutes for Medical Research
18557772 HYPERSIALYLATING CELLS Non-Final OA Novartis AG
18277676 GUEST-HOST SUPRAMOLECULAR ASSEMBLY OF INJECTABLE HYDROGEL NANOFIBERS FOR CELL ENCAPSULATION Final Rejection University of Virginia Patent Foundation
18639238 ISOLATED HUMAN LUNG PROGENITOR CELLS AND USES THEREOF Non-Final OA THE GENERAL HOSPITAL CORPORATION
17918933 METHODS AND COMPOSITIONS FOR IMPROVING SC-BETA CELLS OR ENHANCING THEIR UTILITY Final Rejection WASHINGTON UNIVERSITY
18863109 PEST CONTROL COMPOSITIONS Non-Final OA Rohm and Haas Company
18959230 BIFIDOBACTERIUM LONGUM SUBSP. INFANTIS, MICROBIAL AGENT AND USE THEREOF Non-Final OA SUN YAT-SEN UNIVERSITY
18553345 HEPAROSAN-PRODUCING RECOMBINANT CELLS Final Rejection GIVAUDAN SA
18845060 BACTERIAL COMPOSITION FOR USE IN TREATMENT OF SUBSTANCE USE DISORDER Non-Final OA Bar-Ilan University
18286680 METHOD FOR DETECTING EXOPOLYSACCHARIDE Final Rejection MEIJI CO., LTD.
18706327 REAGENT COMPOSITION AND KIT Non-Final OA DENKA COMPANY LIMITED

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