Prosecution Insights
Last updated: May 29, 2026

Examiner: LEITH, NANCY J

Tech Center 1600 • Art Units: 1636 1681

This examiner grants 75% of resolved cases

Performance Statistics

74.7%
Allow Rate
+14.7% vs TC avg
867
Total Applications
+43.8%
Interview Lift
1104
Avg Prosecution Days
Based on 817 resolved cases, 2023–2026

Rejection Statute Breakdown

4.3%
§101 Eligibility
8.1%
§102 Novelty
47.9%
§103 Obviousness
12.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19343343 EXPRESSION SYSTEM FOR PRODUCT MANUFACTURING Non-Final OA Novel Biotechnology USA, Inc.
19327026 SYNTHETIC GENE CLUSTERS Non-Final OA The Regents of the University of California
17763110 NOVEL RECEPTORS HAVING A HETEROLOGOUS STOP TRANSFER SEQUENCE FOR LIGAND-DEPENDENT TRANSCRIPTIONAL REGULATION Non-Final OA The Regents of the University of California
19272711 METHODS AND COMPOSITIONS FOR MODULATING A GENOME Non-Final OA Flagship Pioneering Innovations VI, LLC
19272775 METHODS AND COMPOSITIONS FOR MODULATING A GENOME Non-Final OA Flagship Pioneering Innovations VI, LLC
17721798 METHOD FOR THE SELECTION OF A LONG-TERM PRODUCING CELL USING HISTONE ACYLATION AS MARKERS Non-Final OA Hoffmann-La Roche Inc.
19174171 ENGINEERED CIRCULARIZED pegRNAs AND USES THEREOF Non-Final OA Trustees of Boston University
17309426 METHODS FOR EX VIVO EXPANSION OF NATURAL KILLER CELLS AND USE THEREOF Final Rejection Board of Regents, The University of Texas System
18279614 METHOD FOR DETECTING MICRORNA IN BIOLOGICAL SAMPLE, COMPOSITION OF HYDROCHLORIDE OF NEUTRAL AMINO ACID, AND CONTAINER Non-Final OA Toray Industries, Inc.
18266692 METHODS FOR DETECTING HOMOGENOUS TARGETS IN A POPULATION WITH NEXT GENERATION SEQUENCING Non-Final OA THE GOVERNMENT OF THE UNITED STATES AS REPRESENTED BY THE SECRETARY OF THE ARMY
18900481 COMPOSITIONS AND METHODS FOR TREATMENT OF TRANSTHYRETIN AMYLOIDOSIS Non-Final OA ACCUREDIT THERAPEUTICS (SUZHOU) CO., LTD.
17298257 SIRT2-ABLATED CHIMERIC T CELLS Non-Final OA H. Lee Moffitt Cancer Center and Research Institute, Inc.
17589081 METHODS AND COMPOSITIONS FOR ASSESSING PROTEIN FUNCTION Non-Final OA University of Oregon
17533007 EVALUATION OF CAS9 MOLECULE/GUIDE RNA MOLECULE COMPLEXES Final Rejection EDITAS MEDICINE, INC.
18009557 TANDEM ANELLOVIRUS CONSTRUCTS Final Rejection FLAGSHIP PIONEERING INNOVATIONS V, INC.
17293802 FUSOSOME COMPOSITIONS FOR T CELL DELIVERY Final Rejection FLAGSHIP PIONEERING INNOVATIONS V, INC.
18025136 METHOD FOR PERFORMING GENE EDITING ON TARGET SITE IN CELL Non-Final OA BRL MEDICINE INC.
18001340 GENETIC MODIFICATION Non-Final OA Peter Biotherapeutics, Inc.
17585694 METHODS AND PRODUCTS FOR PRODUCING ENGINEERED MAMMALIAN CELL LINES WITH AMPLIFIED TRANSGENES Non-Final OA Precision BioSciences, Inc.
17632365 Compositions and Methods for Modulation of Gene Expression Non-Final OA Altius Institute for Biomedical Sciences
17708148 Novel Cell Based Assay Non-Final OA Medical Diagnostics Laboratories, LLC
17482307 COMPOSITIONS AND METHODS FOR MONITORING IN REAL-TIME CONSTRUCTION AND BIOENGINEERING OF MAMMALIAN SYNTHETIC CHROMOSOMES Non-Final OA CarryGenes Bioengineering, LLC
17576583 ARTIFICIAL NUCLEIC ACID MOLECULES Non-Final OA CureVac AG
17368957 Comprehensive Platform for the DNA and RNA In Human Expression of Dimeric and Polymeric Immunoglobulin A Delivered in a Single Payload Non-Final OA Roger B. Swartz

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month