Prosecution Insights
Last updated: October 26, 2026

David W Lambert, USPTO Patent Examiner

Listed by the USPTO as LAMBERT, DAVID W

Tech Center 2600 • Art Units: 2634 2636

This examiner grants 77% of resolved cases

Analysis

LAMBERT, DAVID W works in tech center 2600 and art unit 2634. Among 517 resolved cases, the allowance rate is 76.8%, and the median time to allowance is 777 days.

The interview lift is 12.6%, indicating a positive association with the recorded allowance outcome. Intel Corporation, Mitsubishi Electric Corporation, and Nippon Telegraph and Telephone Corporation are the leading companies. The principal firms are BIRCH STEWART KOLASCH & BIRCH, LLP, FISH & RICHARDSON P.C. (TC), and HAUPTMAN HAM, LLP.

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

Performance Statistics

76.8%
Allow Rate
+14.8% vs TC avg
523
Total Applications
+12.6%
Interview Lift
777
Avg Prosecution Days
Based on 517 resolved cases, 2023–2026

Rejection Statute Breakdown

2.2%
§101 Eligibility
13.2%
§102 Novelty
48.6%
§103 Obviousness
31.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18787886 OPTICAL COHERENT RECEIVER ON A CHIP Non-Final OA Intel Corporation
18854619 WAVELENGTH CROSS CONNECT DEVICE AND WAVELENGTH CROSS CONNECT METHOD Non-Final OA NTT, Inc.
18934172 POWER PROPORTIONALITY IN TRANSCEIVERS Non-Final OA Microsoft Technology Licensing, LLC

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Frequently Asked Questions

What is examiner David W Lambert's allowance rate?

76.8% of resolved applications examined by David W Lambert were allowed (517 resolved cases), compared with 81.9% across Art Unit 2634 over the last five years.

Does an interview help with examiner David W Lambert?

This examiner's interview lift is +12.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner David W Lambert take to allow a patent?

Applications allowed by David W Lambert took 777 days on average from filing to allowance.

Which art unit does examiner David W Lambert work in?

David W Lambert examines applications in Art Unit 2634 in Tech Center 2600 (Communications).

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