Prosecution Insights
Last updated: October 02, 2026

Examiner: CHEN, CATHERYNE

Tech Center 1600 • Art Units: 1655

This examiner grants 37% of resolved cases

Analysis

Catheryne Chen is an examiner in Tech Center 1600 and Art Unit 1655 with 791 resolved cases. The allowance rate is 37.4%, which indicates a more challenging prosecution environment. The median days to allowance is 1551, reflecting a long and rigorous path to obtaining a patent. This 1551-day timeline requires significant persistence from applicants. The 37.4% rate suggests that many applications face multiple rounds of rejection in Art Unit 1655.

The interview lift is 18.0%. This suggests that while the 37.4% allowance rate is low, interviews can provide a meaningful boost to an application's chances. Given the 1551-day median pendency, any strategy that improves the 37.4% rate is worth considering. Practitioners in Tech Center 1600 should be prepared for a difficult and lengthy process. The 18.0% lift indicates that direct communication is a valuable tactic for overcoming hurdles.

The 791 resolved cases provide a strong statistical basis for these trends. The 37.4% allowance rate and 1551-day median to allowance are the primary factors for applicants to manage. The 18.0% interview lift offers a tactical advantage for those navigating the complexities of Art Unit 1655. Practitioners should use these figures to set realistic expectations for the 1551-day duration.

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

Performance Statistics

37.4%
Allow Rate
-22.6% vs TC avg
841
Total Applications
+18.0%
Interview Lift
1551
Avg Prosecution Days
Based on 791 resolved cases, 2023–2026

Rejection Statute Breakdown

14.3%
§101 Eligibility
18.4%
§102 Novelty
41.3%
§103 Obviousness
19.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18579985 CONSTITUENT, DERIVATIVE OR EXTRACT OF CANNABIS IN A WATER SOLUBLE MATRIX Non-Final OA Nicoventures Trading Limited
18511413 CHROMIUM CONTAINING COMPOSITIONS FOR IMPROVING HEALTH AND FITNESS Final Rejection Nutrition21, LLC
18291577 COMPOSITION, AND EXTRACT OF CHLAMYDOMONAS REINHARDTII Final Rejection HONDA MOTOR CO., LTD.
18709931 METHODS AND COMPOSITIONS FOR REPAIR OF TENDON-BONE INTERFACE Non-Final OA MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH
18822591 Application of Gastrodia elata Blume derived nano-extracellular vesicles in the preparation of drugs for the prevention and/or treatment of subarachnoid hemorrhage Non-Final OA Zhejiang University
17907645 PREPARATION FOR USE AS ANTIOXIDANT Non-Final OA Evonik Operations GmbH
18720453 ANTI-STRESS COMPOSITION COMPRISING NATURAL EXTRACT MIXTURE, AND USE THEREOF Non-Final OA AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
17790306 Composition Containing Paper Extracts Non-Final OA LG Household & Health Care Ltd.
18395764 METHODS FOR IMPROVING BONE QUALITY AND PROMOTING CARTILAGE DIFFERENTIATION BY CHRYSOPHYLLUM CAINITO EXTRACT AND MANUFACTURING METHOD THEREOF Final Rejection TCI CO., LTD.
18615328 STIMULATION OF ANGIOGENESIS BY FIBROBLAST DERIVED EXOSOMES Non-Final OA FIGENE, LLC
18619519 INFLAMMATORY CYTOKINE PRODUCTION INHIBITOR Final Rejection SAISEI PHARMA CO., LTD.

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