Prosecution Insights
Last updated: April 19, 2026

Examiner: MATALKAH, FATIMAH KHALAF

Tech Center 1600 • Art Units: 1638

This examiner grants 71% of resolved cases

Performance Statistics

70.8%
Allow Rate
+10.8% vs TC avg
69
Total Applications
+30.4%
Interview Lift
1330
Avg Prosecution Days
Based on 24 resolved cases, 2023–2026

Rejection Statute Breakdown

1.6%
§101 Eligibility
20.5%
§102 Novelty
44.7%
§103 Obviousness
22.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17761876 ENDOTHELIAL AND SMOOTH MUSCLE LIKE TISSUE PRODUCED FROM URINE CELLS AND USES RELATED THERETO Non-Final OA EMORY UNIVERSITY
18278771 EXTRACELLULAR VESICLES DERIVED FROM INDUCED PLURIPOTENT AND EMBRYONIC STEM CELLS, AND METHODS OF USE FOR IMMUNE MODULATION Non-Final OA The Regents of the University of California
17911306 COMPOSITIONS AND METHODS FOR PRODUCTION OF RECOMBINANT ADENO-ASSOCIATED VIRUS Non-Final OA The Regents of the University of California
17775859 LENTIVIRAL VECTORS IN HEMATOPOIETIC STEM CELLS TO TREAT RECOMBINATION-ACTIVATING GENE 1 (RAG1) SEVERE COMBINED IMMUNODEFICIENCY (SCID) Final Rejection The Regents of the University of California
17792203 CELLS HAVING HIGH ADAPTABILITY UNDER HYPOXIC CONDITIONS, AND USE THEREOF Non-Final OA TOOLGEN INCORPORATED
17628517 ENGINEERED NUCLEIC ACID REGULATORY ELEMENT AND METHODS OF USES THEREOF Final Rejection REGENXBIO INC.
17957176 METHOD OF ENHANCING STRUCTURAL INTEGRITY OF EPIDERMIS IN CULTURE OF RECONSTRUCTED HUMAN SKIN Final Rejection Korea University Research and Business Foundation
18261471 GENERATION OF INDUCED HUMAN THYMIC EPITHELIAL CELLS AND ITS APPLICATION IN CELL-BASED IMMUNOTHERAPIES Non-Final OA The Board of Trustees of the Leland Stanford Junior University
17904075 ORTHOGONAL SAFETY SWITCHES TO ELIMINATE GENETICALLY ENGINEERED CELLS Non-Final OA The Board of Trustees of the Leland Stanford Junior University
17772385 MEDIUM AND METHODS FOR CULTURING ORGANOIDS Final Rejection UNIVERSITY HEALTH NETWORK
17801917 INDUCIBLE SINGLE AAV SYSTEM AND USES THEREOF Final Rejection University of Massachusetts
17906715 METHOD OF ENGINEERING AND ISOLATING ADENO-ASSOCIATED VIRUS Non-Final OA Dignity Health
17762693 MULTI-TARGETING EFFECTOR CELLS AND USE THEREOF Final Rejection Fate Therapeutics, Inc.
18564498 BIOENGINEERED DERMAL PAPILLA AND HAIR FOLLICLES AND RELATED PRODUCTS, METHODS AND APPLICATIONS Non-Final OA The University of Hong Kong
17933730 METHOD FOR DIFFERENTIATION OF BRAIN MURAL CELLS FROM HUMAN PLURIPOTENT STEM CELLS Non-Final OA WISCONSIN ALUMNI RESEARCH FOUNDATION
17793287 INDUCIBLE TISSUE CONSTRUCTS AND USES THEREOF Non-Final OA TRUSTEES OF BOSTON UNIVERSITY
17782252 ADOPTIVE CELL THERAPY WITH ZBTB20 SUPPRESSION Non-Final OA THE TRUSTEES OF DARTMOUTH COLLEGE
17779830 DEVICES, METHODS AND ASSAYS FOR BIOLOGICAL MATERIALS Final Rejection StemCell Technologies Canada Inc.
17926145 METHOD FOR GENERATING FUNCTIONAL SKELETAL MUSCLE FIBERS INNERVATED BY MOTONEURONS Non-Final OA INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE
18542586 Factor VIII Molecules and Their Use Non-Final OA Expression Therapeutics, LLC
17927078 Lentiviral System Non-Final OA Expression Therapeutics, LLC
17346630 METHODS TO ELIMINATE CANCER STEM CELLS BY TARGETING CD47 Final Rejection The U.S.A, as represented by the Secretary, Department of Health and Human Services
18566518 CELL COMPOSITION, METHOD FOR PRODUCING CELL COMPOSITION, AND PHARMACEUTICAL COMPOSITION CONTAINING CELL COMPOSITION Non-Final OA KIRIN HOLDINGS KABUSHIKI KAISHA
18564427 VIRAL VECTOR PRODUCTION Non-Final OA pHion Therapeutics Ltd.
17759183 COMPOSITIONS AND METHODS FOR INCREASING OR ENHANCING TRANSDUCTION OF GENE THERAPY VECTORS AND FOR REMOVING OR REDUCING IMMUNOGLOBULINS Non-Final OA SPARK THERAPEUTICS, INC.
18262069 METHODS FOR OPTIMIZING REPRODUCTIVE TISSUE DERIVED CELL YIELD AND VIABILITY FOR CLINICAL APPLICATIONS Non-Final OA GALLANT PET. INC.
18219342 Bioengineered and standardized Human Tissue Reference Controls for Validation of IHC, FISH or CISH Cancer Test Results Non-Final OA SLMP, LLC
18011592 VECTOR Non-Final OA The University of Bristol
18299989 TREATMENT OF NEUROMUSCULAR DISEASES VIA GENE THERAPY THAT EXPRESSES KLOTHO PROTEIN Non-Final OA Fundació Hospital Universitari Vall d’Hebron-Institut de Recerca
18007550 RNA Replicon for Versatile and Efficient Gene Expression Non-Final OA TRON - Translationale Onkologie an der Universitätsmedizin der Johannes Gutenber-Universitä Mainz

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