Prosecution Insights
Last updated: October 02, 2026

Examiner: MITCHELL, EDWIN COLEMAN

Tech Center 1600 • Art Units: 1619 1672

This examiner grants 32% of resolved cases

Analysis

Edwin Coleman Mitchell is an examiner in Tech Center 1600, operating in Art Unit 1619. He has 108 resolved cases, which provides a solid foundation for analyzing his examination style. The allowance rate is 31.5 percent, indicating a rigorous review process for applications on his docket.

A very high interview lift of 66.3 percent is a defining characteristic of this examiner's data. This suggests that an interview is exceptionally effective, as it dramatically increases the probability of allowance compared to the 31.5 percent baseline. Practitioners should strongly consider requesting an interview to navigate the challenges in Art Unit 1619.

The median days to allowance for this examiner is 1232. This timeline reflects the typical duration for applications that successfully reach a grant. Given the 31.5 percent allowance rate, the 66.3 percent interview lift is the most critical factor for practitioners to leverage when seeking a positive outcome.

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

Performance Statistics

32.1%
Allow Rate
-27.9% vs TC avg
170
Total Applications
+64.8%
Interview Lift
1232
Avg Prosecution Days
Based on 109 resolved cases, 2023–2026

Rejection Statute Breakdown

1.9%
§101 Eligibility
10.0%
§102 Novelty
43.6%
§103 Obviousness
26.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18642305 HIGH-THROUGHPUT METHODS FOR PREPARING LIPID NANOPARTICLES AND USES THEREOF Non-Final OA GENENTECH, INC.
18391998 POLYMERIC IMPLANTS WITH HIGH DRUG LOADING AND LONG-ACTING DRUG RELEASE AND METHODS OF MAKING THE SAME Final Rejection The University of North Carolina at Chapel Hill
18585517 Dry Shampoo Spray Foam Technology Final Rejection Henkel AG & Co. KGaA
17611272 METHODS AND COMPOSITIONS FOR TREATING CARDIOMYOCYTES Final Rejection The Board of Trustees of the Leland Stanford Junior University
17760390 COMPOSITIONS AND APPLICATIONS THEREOF Final Rejection Kenvue Brands LLC
18450086 TRIPLE STABILIZER SYSTEM Final Rejection Bayer Aktiengesellschaft
18199625 OZONE-BASED LOW TEMPERATURE SILICON OXIDE COATING FOR PHARMACEUTICAL APPLICATIONS Non-Final OA Applied Materials, Inc.
18723242 PROCESS FOR DYEING KERATIN FIBRES USING A COSMETIC COMPOSITION COMPRISING PROPANE-1,3-DIOL AND A DYEING COMPOSITION Non-Final OA L'Oreal
18719177 PROCESS FOR COLOURING THE HAIR COMPRISING THE APPLICATION OF A COMPOSITION COMPRISING A (POLY)CARBODIIMIDE COMPOUND, AND THE APPLICATION OF A COMPOSITION COMPRISING A SILICONE ELASTOMER CONTAINING CARBOXYLIC ACID FUNCTIONS Non-Final OA L'Oreal
18731045 COMPOSITIONS AND METHODS FOR CLEANSING KERATIN MATERIALS Non-Final OA L'Oreal
18681449 METHOD FOR BLEACHING THE HAIR Non-Final OA L'OREAL
18691620 COSMETIC COMPOSITION Final Rejection SHISEIDO COMPANY, LTD.
17265751 ORAL FORMULATIONS WITH INCREASED UPTAKE Non-Final OA Brown University
18576185 PASTE-LIKE SILICONE COMPOSITION, METHOD FOR PRODUCING THE SAME, AND COSMETICS Final Rejection SHIN-ETSU CHEMICAL CO., LTD.
17534956 Stable Liquid Lipid Nanoparticle Formulations Non-Final OA Translate Bio, Inc.
17916998 DECELLULARIZED MENISCAL CARTILAGE AND USES THEROF Final Rejection The Children's Hospital of Philadelphia
17765625 LIPOSOMAL CANNABINOIDS AND USES THEREOF Non-Final OA YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEM LTD
17757314 AUGMENTATION OF FIBROBLAST MEDIATED REGENERATION OF INTRAVERTEBRAL DISCS Non-Final OA FIGENE, LLC
18619073 TOOTH GEL AND TOOTH STRIP WITH REMINERALIZATION CAPABILITY AND PREPARATION METHOD OF TOOTH GEL Non-Final OA CENTRAL SOUTH UNIVERSITY
18526027 Method and Product for the Identification of Diseased Animals Final Rejection Sideris Pet Pharmaceuticals, LP

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