Prosecution Insights
Last updated: October 26, 2026

Joseph S Leyson, USPTO Patent Examiner

Listed by the USPTO as LEYSON, JOSEPH S

Tech Center 3700 • Art Units: 1731 1742 1744 1791 3783

This examiner grants 66% of resolved cases

Analysis

LEYSON, JOSEPH S works in Tech Center 3700 and Art Unit 1731. His record contains 755 resolved cases, a 66.2% allowance rate, and a median of 1120 days to allowance. Interviews are associated with a 35.9% lift, supporting their use when counsel can present focused distinctions or resolve ambiguity in the examiner's concerns.

The principal companies are Terumo Corporation, The Azek Group LLC, and Reel Power Licensing Corp. The leading firms are Bayramoglu Law Offices LLC, Boone IP Law, PLLC, and BUCHANAN, INGERSOLL & ROONEY PC. The profile supports coordinating interview preparation with written responses and planning for prosecution that extends beyond the initial examination cycle.

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

Performance Statistics

66.2%
Allow Rate
-3.8% vs TC avg
791
Total Applications
+35.9%
Interview Lift
1120
Avg Prosecution Days
Based on 755 resolved cases, 2023–2026

Rejection Statute Breakdown

0.7%
§101 Eligibility
14.7%
§102 Novelty
44.1%
§103 Obviousness
34.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18417573 MANUFACTURING METHOD FOR CATHETER AND MANUFACTURING APPARATUS FOR CATHETER Non-Final OA TERUMO KABUSHIKI KAISHA
18549770 METHODS, SYSTEMS, AND DEVICES FOR GENERATING DEFINED FIBER CONSTRUCTS Final Rejection Arizona Board of Regents on Behalf of The University of Arizona

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Frequently Asked Questions

What is examiner Joseph S Leyson's allowance rate?

66.2% of resolved applications examined by Joseph S Leyson were allowed (755 resolved cases), compared with 55.4% across Art Unit 1731 over the last five years.

Does an interview help with examiner Joseph S Leyson?

This examiner's interview lift is +35.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Joseph S Leyson take to allow a patent?

Applications allowed by Joseph S Leyson took 1,120 days on average from filing to allowance.

Which art unit does examiner Joseph S Leyson work in?

Joseph S Leyson examines applications in Art Unit 1731 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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