Prosecution Insights
Last updated: April 19, 2026

Examiner: LEITH, NANCY J

Tech Center 1600 • Art Units: 1636

This examiner grants 75% of resolved cases

Performance Statistics

74.7%
Allow Rate
+14.7% vs TC avg
861
Total Applications
+43.6%
Interview Lift
1130
Avg Prosecution Days
Based on 807 resolved cases, 2023–2026

Rejection Statute Breakdown

7.8%
§101 Eligibility
12.6%
§102 Novelty
29.5%
§103 Obviousness
27.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17495219 CRISPR EFFECTOR SYSTEM BASED DIAGNOSTICS Non-Final OA President and Fellows of Harvard College
17201347 DELIVERY, USE AND THERAPEUTIC APPLICATIONS OF THE CRISPR-CAS SYSTEMS AND COMPOSITIONS FOR TARGETING DISORDERS AND DISEASES USING VIRAL COMPONENTS Final Rejection President and Fellows of Harvard College
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
19272775 METHODS AND COMPOSITIONS FOR MODULATING A GENOME Non-Final OA Flagship Pioneering Innovations VI, LLC
19272711 METHODS AND COMPOSITIONS FOR MODULATING A GENOME Non-Final OA Flagship Pioneering Innovations VI, LLC
17783786 crRNA:tracrRNA-BASED BINARY LOGIC GATE DESIGN AS A TOOL FOR SYNTHETIC BIOLOGY Non-Final OA North Carolina State University
17721798 METHOD FOR THE SELECTION OF A LONG-TERM PRODUCING CELL USING HISTONE ACYLATION AS MARKERS Non-Final OA Hoffmann-La Roche Inc.
16325892 NOVEL CRISPR ENZYMES AND SYSTEMS Final Rejection MASSACHUSETTS INSTITUTE OF TECHNOLOGY
18463628 CRISPR-CAS /TRANSCRIPTION FACTOR-BASED COMPETITION ASSAY FOR DETECTION OF MOLECULAR ANALYTES Non-Final OA Arizona Board of Regents on Behalf of Arizona State University
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
16094587 METHOD FOR INCREASING MUTATION INTRODUCTION EFFICIENCY IN GENOME SEQUENCE MODIFICATION TECHNIQUE, AND MOLECULAR COMPLEX TO BE USED THEREFOR Final Rejection NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY
17832457 METHODS AND COMPOSITIONS FOR RNA-GUIDED TREATMENT OF HIV INFECTION Non-Final OA Temple University-of The Commonwealth System of Higher Education
17533007 EVALUATION OF CAS9 MOLECULE/GUIDE RNA MOLECULE COMPLEXES Final Rejection EDITAS MEDICINE, INC.
17482307 COMPOSITIONS AND METHODS FOR MONITORING IN REAL-TIME CONSTRUCTION AND BIOENGINEERING OF MAMMALIAN SYNTHETIC CHROMOSOMES Non-Final OA CarryGenes Bioengineering, LLC
17692108 SIMULTANEOUS MULTIPLEX GENOME EDITING IN YEAST Non-Final OA Inscripta, Inc.
16626932 NOVEL CRISPR RNA TARGETING ENZYMES AND SYSTEMS AND USES THEREOF Non-Final OA Arbor Biotechnologies, 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.
17832409 INTEGRATION OF NUCLEIC ACID CONSTRUCTS INTO EUKARYOTIC CELLS WITH A TRANSPOSASE FROM ORYZIAS Non-Final OA DNA TWOPOINTO 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.
17708148 Novel Cell Based Assay Non-Final OA Medical Diagnostics Laboratories, LLC
17576583 ARTIFICIAL NUCLEIC ACID MOLECULES Non-Final OA CureVac AG
17632365 Compositions and Methods for Modulation of Gene Expression Non-Final OA Altius Institute for Biomedical Sciences

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