Prosecution Insights
Last updated: April 19, 2026

Examiner: ESPERON, NATHAN GREGORY

Tech Center 1700 • Art Units: 1657 1799

This examiner grants 41% of resolved cases

Performance Statistics

40.7%
Allow Rate
-24.3% vs TC avg
144
Total Applications
+24.4%
Interview Lift
1584
Avg Prosecution Days
Based on 113 resolved cases, 2023–2026

Rejection Statute Breakdown

1.3%
§101 Eligibility
13.3%
§102 Novelty
43.3%
§103 Obviousness
33.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17558243 APPARATUSES AND SYSTEMS FOR PREPARING A MEAT PRODUCT Non-Final OA Upside Foods, Inc.
18184800 SYSTEM AND METHOD FOR TISSUE MAINTENANCE, ASSESSMENT, MATURATION, AND REHABILITATION Final Rejection DEKA Products Limited Partnership
17442709 GREENHOUSE GAS IMPROVED FERMENTATION Non-Final OA DSM IP ASSETS B.V.
17911553 REAGENT INJECTIONS INTO CELLS Final Rejection HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
17911559 MICROFLUIDIC CHIP CELL SORTING AND TRANSFECTION Non-Final OA HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
17287349 MULTIPLEXED SINGLE-CELL ANALYSIS USING OPTICALLY-ENCODED RNA CAPTURE PARTICLES Final Rejection THE GENERAL HOSPITAL CORPORATION
17955738 CELL SEPARATION PARTICLES FOR AND/NOT OPERATIONS OR MULTIPLE TARGETS Final Rejection The Charles Stark Draper Laboratory, Inc.
18778914 HUMAN VASCULARIZED INTEGRATED ORGAN SYSTEM AND APPLICATIONS THEREOF Non-Final OA 3D Systems, Inc.
17712989 Additive Manufacturing of a Packed Bed Bioreactor Final Rejection The Government of the United States of America, as represented by the Secretary of the Navy
16229272 SENSOR FOR CHEMICAL ANALYSIS AND METHODS FOR MANUFACTURING THE SAME Final Rejection Life Technologies Corporation
17822209 CONFINED MIGRATION MICROFLUIDIC DEVICE FOR CELL CULTURE AND DRUG SCREENING Non-Final OA City University of Hong Kong
17983414 COMBINED ALGAE PRODUCTION SYSTEM AND APPLICATION SYSTEM Non-Final OA SUN YAT-SEN UNIVERSITY
17913933 BODY TISSUE MONITOR, BODY TISSUE PRESERVATION SYSTEM AND CORRESPONDING METHOD Final Rejection UNIVERSITY OF NEWCASTLE UPON TYNE
17798960 APPARATUS AND METHOD Non-Final OA UNIVERSITY OF NEWCASTLE UPON TYNE
18454368 METHODS AND SYSTEMS FOR PROPAGATING MICROORGANISMS FOR MITIGATING MYCOTOXIN CONTAMINATION, AND RELATED SYSTEMS AND METHODS Non-Final OA POET Research, Inc.
18500552 Artificial Skeletal Muscle Tissue Non-Final OA VALO HEALTH, INC.
17416161 THREE-DIMENSIONAL SUBSTRATE FOR MICROBIAL CULTURES Non-Final OA UNIVERSITA' DEGLI STUDI DI TORINO
17168085 CELL CULTURE BIOREACTOR WITH ZONE CONTROL Final Rejection ABEC, Inc.
18093708 PHOTO-BIOREACTOR DEVICE AND METHODS Non-Final OA ARBOREA LTD
18065357 Improved Airlift Bioreactor Non-Final OA The Better Meat Co.
17986060 SYSTEM AND METHOD FOR ORGANOID CULTURE Final Rejection Molecular Devices (Austria) GmbH
17789707 MAGNETOELASTIC MICROCARRIERS AND MONITORING SYSTEM Final Rejection Salil S. Karipott
17766766 DRUM COMPOSTER, COMPOSTING DRUM USED IN THIS AND COMPOSTING METHOD Final Rejection PROFIKOMP KÖRNYEZETTECHNIKA ZRT.
17522726 GAS BIOCATALYSIS VIA AN IMMOBILIZED CELL BIOREACTOR Non-Final OA Alliance for Energy Innovation, LLC
17430820 CULTURE SUBSTRATE FOR METHANISATION METHOD Non-Final OA BioRenGaz

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