Prosecution Insights
Last updated: October 02, 2026

Examiner: MATALKAH, FATIMAH KHALAF

Tech Center 1600 • Art Units: 1638

This examiner grants 55% of resolved cases

Analysis

Fatimah Khalaf Matalkah has resolved 42 cases in Art Unit 1638, resulting in an allowance rate of 54.8%. The median days to allowance is quite high at 1328. This suggests a prolonged prosecution cycle in Tech Center 1600. The interview lift is 28.6%, which significantly improves the 54.8% baseline. This 28.6% lift suggests that interviews are a critical strategy for navigating the 1328-day median pendency.

With 42 resolved cases, the lift is a key takeaway for practitioners. The 54.8% allowance rate indicates a moderate probability of success. Applicants should prepare for a 1328-day path to resolution. The 28.6% lift shows that direct communication is highly effective with this examiner. In Art Unit 1638, the 1328-day median is a significant hurdle that requires careful planning.

In Tech Center 1600, the 54.8% rate serves as the primary benchmark. The 28.6% interview lift is one of the most impactful metrics in this profile. By utilizing the 1328-day median as a guide, practitioners can better manage expectations for their clients. The 42 cases provide a developing but clear picture of the examiner's responsiveness to interviews.

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

Performance Statistics

54.8%
Allow Rate
-5.2% vs TC avg
81
Total Applications
+28.6%
Interview Lift
1328
Avg Prosecution Days
Based on 42 resolved cases, 2023–2026

Rejection Statute Breakdown

1.9%
§101 Eligibility
15.6%
§102 Novelty
55.0%
§103 Obviousness
18.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17793287 INDUCIBLE TISSUE CONSTRUCTS AND USES THEREOF Final Rejection TRUSTEES OF BOSTON UNIVERSITY
18412130 CELL CULTURE METHOD, CELL CULTURE CONTAINER, METHOD FOR PRODUCING CELL CULTURE CONTAINER, AND CELL-CONTAINING STRUCTURE Final Rejection RICOH COMPANY, LTD.
18332380 GENERATION OF NEXT GENERATION RECOMBINANT AAV GENE THERAPY VECTORS THAT ADOPT 3D CONFORMATION Final Rejection WISCONSIN ALUMNI RESEARCH FOUNDATION
18566782 ASSAY FOR EXTRINSIC INHIBITION Non-Final OA The Regents of The University of California
18278771 EXTRACELLULAR VESICLES DERIVED FROM INDUCED PLURIPOTENT AND EMBRYONIC STEM CELLS, AND METHODS OF USE FOR IMMUNE MODULATION Final Rejection The Regents of the University of California
17911306 COMPOSITIONS AND METHODS FOR PRODUCTION OF RECOMBINANT ADENO-ASSOCIATED VIRUS Final Rejection The Regents of the University of California
18559921 ANELLOVECTORS AND METHODS OF USE Non-Final OA FLAGSHIP PIONEERING INNOVATIONS V, INC.
18720003 ANTI-FIBROUS CELLS, MEDICAMENT COMPRISING THE CELLS, AND METHOD FOR OBTAINING THESE CELLS Non-Final OA B. Braun Avitum AG
17782252 ADOPTIVE CELL THERAPY WITH ZBTB20 SUPPRESSION Final Rejection THE TRUSTEES OF DARTMOUTH COLLEGE
18557033 ADENO-ASSOCIATED VIRAL VECTORS FOR TRANSDUCTION OF COCHLEA Non-Final OA THE CHILDREN'S HOSPITAL OF PHILADELPHIA
17907171 REPORTER SYSTEM FOR RADIONUCLIDE IMAGING Non-Final OA Erasmus University Medical Center Rotterdam
18653905 METHODS FOR CONTROLLING BLEEDING IN A SUBJECT AFFLICTED WITH HERMANSKY PUDLAK SYNDROME USING PLATELET DERIVATIVE COMPOSITIONS Non-Final OA Cellphire, Inc.
18413896 VECTORS ENCODING GENE EDITING SYSTEMS AND USES THEREOF Non-Final OA Mammoth Biosciences, Inc.
18264104 GENE THERAPY FOR RETINAL DISEASES Non-Final OA Greffex, Inc.
17927078 Lentiviral System Non-Final OA Expression Therapeutics, LLC

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