Prosecution Insights
Last updated: October 02, 2026

Examiner: POPA, ILEANA

Tech Center 1600 • Art Units: 1600 1633 1663

This examiner grants 21% of resolved cases

Analysis

Ileana Popa is an examiner in Tech Center 1600, Art Unit 1600, with 845 resolved cases. She has a low allowance rate of 21.4 percent, which indicates a difficult path for applicants. The median time to allowance is 1715 days, reflecting a very long and potentially arduous prosecution process. This timeline suggests that applications often face a rigorous review before any possibility of a grant.

The interview lift for this examiner is 15.1 percent. While this lift is significant relative to the 21.4 percent allowance rate, the overall chances of success remain low. Practitioners should be prepared for a long-term commitment, as shown by the 1715-day median pendency. With 845 resolved cases, the examiner's data shows a consistent pattern of high scrutiny and slow resolution in Art Unit 1600. An interview may be a necessary step to try and improve the low probability of allowance.

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

Performance Statistics

21.4%
Allow Rate
-38.6% vs TC avg
902
Total Applications
+15.1%
Interview Lift
1715
Avg Prosecution Days
Based on 845 resolved cases, 2023–2026

Rejection Statute Breakdown

2.3%
§101 Eligibility
7.6%
§102 Novelty
48.6%
§103 Obviousness
20.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18711131 Method of Treating Geographic Atrophy with a Gene Therapy Vector Expressing Soluble CD59 Non-Final OA Janssen Biotech, Inc.
18583364 Neoantigens Expressed In Ovarian Cancer And Their Uses Non-Final OA Janssen Biotech, Inc.
18088544 POLYMERIC NANOPARTICLES AND DERIVATIVES THEREOF FOR NUCLEIC ACID BINDING AND DELIVERY Final Rejection University of Massachusetts
16623268 MATERIALS AND METHODS FOR INCREASING IMMUNE RESPONSES Final Rejection Mayo Foundation for Medical Education and Research
17925470 FUNCTIONAL LIPID DERIVATIVES AND USES THEREOF Final Rejection Ohio State Innovation Foundation
18022415 METHOD FOR IN VITRO PRODUCTION OF RED BLOOD CELLS Final Rejection IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
16813263 Methods of Generating Mature Human Muscle Fibers Non-Final OA University of Maryland, Baltimore
18590366 THERAPEUTIC AGENT FOR ARTHROSIS AND PRODUCTION METHOD FOR THERAPEUTIC AGENT FOR ARTHROSIS Non-Final OA National University Corporation Tokyo Medical and Dental University
18555385 SIGNAL PEPTIDES Non-Final OA IMPERIAL COLLEGE INNOVATIONS LIMITED
15327794 SUBSET-OPTIMIZED CHIMERIC ANTIGEN RECEPTOR-CONTAINING T-CELLS Final Rejection The Trustees of the University of Pennsylvania
18068922 MAMMALIAN CELL CULTURE Non-Final OA AMGEN INC.
18249037 GLYCOSYLTRANSFERASE VARIANTS FOR IMPROVED PROTEIN PRODUCTION Final Rejection Novozymes A/S
18289028 COMPOSITIONS AND METHODS FOR TREATING SENSORINEURAL HEARING LOSS USING STEREOCILIN DUAL VECTOR SYSTEMS Non-Final OA Decibel Therapeutics, Inc.
18465333 COMPOSITONS AND METHODS FOR USE OF KALIUM CHANNEL RHODOPSINS Non-Final OA BAYLOR COLLEGE OF MEDICINE
18003646 C825 EXPRESSING IMMUNE CELLS AND DIAGNOSTIC USES THEREOF Non-Final OA Memorial Sloan Kettering Cancer Center
17765507 METHOD FOR PRODUCING HEPARIN-LIKE SUBSTANCE, RECOMBINANT CELL, AND METHOD FOR PRODUCING THE SAME Non-Final OA KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
18890983 STEREOCHEMICALLY ENRICHED COMPOSITIONS FOR DELIVERY OF NUCLEIC ACIDS Non-Final OA TRANSLATE BIO, INC.
17450629 PROCESS OF PREPARING MRNA-LOADED LIPID NANOPARTICLES Non-Final OA Translate Bio, Inc.
18816718 T CELLS FOR EXPRESSION OF CHIMERIC ANTIGEN RECEPTORS AND OTHER RECEPTORS Non-Final OA City of Hope
18093902 METHODS OF PRODUCING ENRICHED POPULATIONS OF TUMOR-REACTIVE T CELLS FROM TUMOR Non-Final OA The United States of America,as represented by the Secretary,Department of Health and Human Services
18375392 METHODS FOR PRODUCING SINGLE INSECT CELL CLONES Final Rejection uniQure biopharma B.V.
17273724 MATERIALS AND METHODS FOR THE CORRECTION OF RETINITIS PIGMENTOSA Non-Final OA BLUEALLELE, LLC

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