Prosecution Insights
Last updated: October 02, 2026

Examiner: YAMASAKI, ROBERT J

Tech Center 1700 • Art Units: 1621 1651 1657 1682 1759

This examiner grants 68% of resolved cases

Analysis

Robert J. Yamasaki operates in Tech Center 1700 and Art Unit 1621. The examiner has 565 resolved cases in their history. The data shows an allowance rate of 67.6 percent. The median days to allowance for this examiner is 1184, which helps practitioners set expectations for the timeline of applications. This 1184 day duration represents the middle point of the prosecution period from filing to grant for applications in Art Unit 1621.

The interview lift is 43.7 percent. This suggests that interviews are associated with a much higher probability of allowance compared to cases where no interview is held. Given the 565 resolved cases, the 43.7 percent lift is a key metric for practitioners to consider. Using an interview may significantly improve the 67.6 percent allowance rate while navigating the 1184 day median duration for applications assigned to this examiner.

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

Performance Statistics

67.6%
Allow Rate
+2.6% vs TC avg
594
Total Applications
+43.7%
Interview Lift
1184
Avg Prosecution Days
Based on 565 resolved cases, 2023–2026

Rejection Statute Breakdown

2.7%
§101 Eligibility
10.4%
§102 Novelty
38.2%
§103 Obviousness
31.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19459949 METHODS FOR IMMOBILIZING AND SORTING A CELL USING LIGHT Non-Final OA Cellanome, Inc.
17415010 METHOD OF ENCODING DATA ON A POLYNUCLEOTIDE STRAND Final Rejection Oxford Nanopore Technologies PLC
18722445 A METHOD FOR REDUCING AMMONIA EMISSION OF ANIMALS Non-Final OA DSM IP ASSETS B.V.
18833797 GENETICALLY ENGINEERED BACTERIUM FOR THE PRODUCTION OF 3-HYDROXYBUTYRATE Non-Final OA Alliance for Energy Innovation LLC
18288728 NOVEL PROTEIN HAVING METHANE OR BUTANE OXIDATION ACTIVITY Final Rejection KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
18264843 METHODS FOR (POLY) PEPTIDE TANDEM LIGATION AND CYCLIZATION Non-Final OA Nanyang Technological University
18571661 RECOMBINANT CUTINASE EXPRESSION Final Rejection Novozymes A/S
18732149 NUCLEOSIDE TRIPHOSPHATE PHOTOAFFINITY PROBE, METHOD FOR PREPARING SAME, AND APPLICATIONS THEREOF Non-Final OA SHANDONG UNIVERSITY
17658009 GENERATION OF CELL-BASED PRODUCTS FOR CONSUMPTION THAT COMPRISE PROTEINS FROM EXOTIC, ENDANGERED, AND EXTINCT SPECIES Final Rejection The Upside Group Inc.

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