Prosecution Insights
Last updated: October 27, 2026

Brian David Mattei, USPTO Patent Examiner

Listed by the USPTO as MATTEI, BRIAN DAVID

Tech Center 3600 • Art Units: 3633 3634 3635 3673 3678

This examiner grants 67% of resolved cases

Analysis

MATTEI, BRIAN DAVID works in Tech Center 3600 and Art Unit 3633. He has 737 resolved cases, a 67.3% allowance rate, and a 677-day median to allowance. The median indicates a comparatively short reported path to allowance, while the allowance rate shows that more than half of the resolved matters reached allowance.

The interview lift is 15.5%, supporting examiner interviews as a useful part of prosecution strategy. Recurring companies include MSA Safety Incorporated, Teufelberger Fiber Rope GmbH, and Certainteed LLC. The listed firms are Abel Schillinger, LLP, FREDRIKSON & BYRON, P.A., and MAIER & MAIER, PLLC. Counsel can use interviews to narrow issues before pursuing further written amendments.

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

Performance Statistics

67.3%
Allow Rate
+15.3% vs TC avg
760
Total Applications
+15.5%
Interview Lift
677
Avg Prosecution Days
Based on 737 resolved cases, 2023–2026

Rejection Statute Breakdown

0.4%
§101 Eligibility
21.3%
§102 Novelty
49.5%
§103 Obviousness
23.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18888414 CORNER PIECE FOR SIDING SYSTEM Non-Final OA CERTAINTEED LLC

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Frequently Asked Questions

What is examiner Brian David Mattei's allowance rate?

67.3% of resolved applications examined by Brian David Mattei were allowed (737 resolved cases), compared with 57.2% across Art Unit 3633 over the last five years.

Does an interview help with examiner Brian David Mattei?

This examiner's interview lift is +15.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Brian David Mattei take to allow a patent?

Applications allowed by Brian David Mattei took 677 days on average from filing to allowance.

Which art unit does examiner Brian David Mattei work in?

Brian David Mattei examines applications in Art Unit 3633 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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