Prosecution Insights
Last updated: April 19, 2026

Examiner: TSAY, MARSHA M

Tech Center 1700 • Art Units: 1656 1693 1754

This examiner grants 46% of resolved cases

Performance Statistics

45.7%
Allow Rate
-19.3% vs TC avg
889
Total Applications
+52.1%
Interview Lift
1418
Avg Prosecution Days
Based on 836 resolved cases, 2023–2026

Rejection Statute Breakdown

2.5%
§101 Eligibility
11.6%
§102 Novelty
44.9%
§103 Obviousness
17.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17846696 COMPOSITIONS COMPRISING ENZYMES Final Rejection The Procter & Gamble Company
19264681 PURIFIED PROTEIN COMPOSITIONS AND METHODS OF PRODUCTION Final Rejection Clara Foods Co.
18452884 CYCLIC LIPOPEPTIDE-PRODUCING MICROBIAL STRAIN AND METHOD FOR PRODUCING CYCLIC LIPOPEPTIDE Non-Final OA KANEKA CORPORATION
17416814 URINE STABILIZATION Final Rejection QIAGEN GmbH
18036695 MICROBIAL PRODUCTION OF TITIN FIBERS WITH EXCEPTIONAL MECHANICAL PERFORMANCE Non-Final OA Washington University
18247616 A DNA Assembly Mix And Method Of Uses Thereof Non-Final OA National University of Singapore
17436338 NON-VIRAL MODIFICATION OF MESENCHYMAL STEM CELLS Non-Final OA NATIONAL UNIVERSITY OF SINGAPORE
18007274 MUTANT INSECT OLFACTORY RECEPTOR PROTEIN Non-Final OA SUMITOMO CHEMICAL COMPANY, LIMITED
17908427 PROTEINS WITH PREDICTABLE LIQUID-LIQUID PHASE SEPARATION Non-Final OA Duke University
18707400 3D-PRINTING ENGINEERED LIVING MATERIALS Non-Final OA The Trustees of Princeton University
18756409 A PROCESS FOR MANUFACTURING A POTENTIATING PROTEIN COMPOSITION WITH INCREASED EFFICIENCY AND LONGEVITY AND USES THEREOF Non-Final OA 14787285 Canada Inc. dba Nuria Scientific
18255869 METHODS AND COMPOSITIONS FOR INHIBITING EXCESS NUCLEIC ACID PRECIPITATION Non-Final OA PFIZER INC.
18020843 REAL-TIME CELLULAR THERMAL SHIFT ASSAY (RT-CETSA) FOR RESEARCH AND DRUG DISCOVERY Non-Final OA The United States of America,as represented by the Secretary,Department of Health and Human Services
17995624 GENE EXPRESSION SYSTEM FOR RAPID CONSTRUCTION OF MULTIPLE-GENE PATHWAY IN OLEAGINOUS YEASTS Non-Final OA WASHINGTON STATE UNIVERSITY
17924204 THERAPEUTIC OR PREVENTIVE AGENT FOR INFECTIOUS DISEASE Final Rejection NIPPON MEDICAL SCHOOL FOUNDATION
17908761 MODIFIED TRANSGLUTAMINASE Final Rejection Amano Enzyme Inc.
18031301 PROTEIN HAVING FERMENTED MILK VISCOSITY IMPROVING EFFECT, FERMENTED MILK USING THE SAME AND METHOD FOR PRODUCING THE SAME Non-Final OA MEIJI CO., LTD.
18176546 Compositions and Methods for Modulating Factor IX Function Final Rejection The Children's Hospital of Philadelphia
18275255 CELL CULTURE METHODS Non-Final OA DR. REDDY’S LABORATORIES LIMITED
18280403 GENE FOR EFFICIENTLY EXPRESSING HYALURONIC ACID HYDROLASE AND EXPRESSION METHOD THEREOF Non-Final OA BLOOMAGE BIOTECHNOLOGY CORPORATION LIMITED
18016648 METHODS AND SYSTEMS FOR PRODUCING POLYPEPTIDES Non-Final OA Seagen Inc.
18253651 LOW-DOSE HEPATOCYTE GROWTH FACTOR GENE THERAPY FOR DIABETES Non-Final OA KAGOSHIMA UNIVERSITY
16627227 AAV VECTOR COLUMN PURIFICATION METHODS Non-Final OA Spark Therapeutics, Inc.
18254859 RECOMBINANT MICROORGANISM HAVING IMPROVED ABILITY TO PRODUCE RECOMBINANT SILK PROTEIN AND METHOD FOR PRODUCING HIGH-MOLECULAR-WEIGHT RECOMBINANT SILK PROTEIN BY USING SAME Non-Final OA MEDICOSBIOTECH, INC
17188173 METHOD OF PURIFYING THERAPEUTIC PROTEINS Final Rejection CSL Behring GmbH
18131968 BIOSENSING ELEMENT BASED ON SPECIFIC BINDING OF CBM AND CELLULOSE Non-Final OA BIOLOGY INSTITUTE OF SHANDONG ACADEMY OF SCIENCES
18296454 COMPOSITIONS AND METHODS FOR TREATING METABOLIC DISEASES Final Rejection SHANGHAI HEP PHARMACEUTICAL CO., LTD.
18174319 Preparation Method And Usage Method For Cartilage Tissue Recovery Collagen Non-Final OA Cellontech Co., Ltd.
18020429 METHOD FOR THE EFFICIENT EXPRESSION AND PURIFICATION AND APPLICATION OF A RECOMBINANT FUSION PROTEIN OF MANNASE AND HOMOLOGUES THEREOF AND GLP-1 Non-Final OA ANHUI NEW SIMON BIOTECH CO., LTD.
18002806 Compositions and Methods for Treating Hemorrhagic Shock Non-Final OA VirTech Bio, Inc

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