Prosecution Insights
Last updated: October 26, 2026

Robert J Yamasaki, USPTO Patent Examiner

Listed by the USPTO as YAMASAKI, ROBERT J

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

This examiner grants 67% of resolved cases

Analysis

YAMASAKI, ROBERT J has 567 resolved cases, an allowance rate of 67.4%, and an interview lift of 44.1%. The median time to allowance is 1,185 days. The examiner is assigned to tech center 1700 and art unit 1621. The substantial case record supports using these figures as a meaningful starting point for prosecution planning.

Cellanome Inc., Oxford Nanopore Technologies PLC, and Shandong University are the leading companies in the profile. The listed leading firms are MORRISON & FOERSTER LLP, SEED INTELLECTUAL PROPERTY LAW GROUP LLP, and BakerHostetler. The interview figure gives interviews a material role in response strategy, although counsel should connect any discussion to concrete claim distinctions and a well-supported written record.

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

Performance Statistics

67.4%
Allow Rate
+2.4% vs TC avg
599
Total Applications
+44.1%
Interview Lift
1185
Avg Prosecution Days
Based on 567 resolved cases, 2023–2026

Rejection Statute Breakdown

2.7%
§101 Eligibility
10.6%
§102 Novelty
38.0%
§103 Obviousness
31.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18516616 VARIANTS OF A DNA POLYMERASE OF THE POLX FAMILY Final Rejection Centre National De La Recherche Scientifique
18722445 A METHOD FOR REDUCING AMMONIA EMISSION OF ANIMALS Non-Final OA DSM IP ASSETS B.V.
18288728 NOVEL PROTEIN HAVING METHANE OR BUTANE OXIDATION ACTIVITY Non-Final OA KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
18264843 METHODS FOR (POLY) PEPTIDE TANDEM LIGATION AND CYCLIZATION Non-Final OA Nanyang Technological University

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Frequently Asked Questions

What is examiner Robert J Yamasaki's allowance rate?

67.4% of resolved applications examined by Robert J Yamasaki were allowed (567 resolved cases), compared with 46.0% across Art Unit 1621 over the last five years.

Does an interview help with examiner Robert J Yamasaki?

This examiner's interview lift is +44.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Robert J Yamasaki take to allow a patent?

Applications allowed by Robert J Yamasaki took 1,185 days on average from filing to allowance.

Which art unit does examiner Robert J Yamasaki work in?

Robert J Yamasaki examines applications in Art Unit 1621 in Tech Center 1700 (Chemistry & Materials).

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