Prosecution Insights
Last updated: October 27, 2026

David J Walczak, USPTO Patent Examiner

Listed by the USPTO as WALCZAK, DAVID J

Tech Center 3700 • Art Units: 3751 3754 3761 3772 3781

This examiner grants 74% of resolved cases

Analysis

WALCZAK, DAVID J works in Tech Center 3700 and Art Unit 3751, with 1770 resolved cases. The allowance rate is 74.1%, and the median time to allowance is 873 days. Interview lift is 17.7%, indicating a positive association between interviews and allowance outcomes.

Nestlé S.A., Albea Services, and MITSUBISHI PENCIL Company, Limited are the leading companies. BakerHostetler, Bridgeway IP Law Group, PLLC, and Calfee, Halter & Griswold LLP are the leading firms. The substantial case volume gives the profile a broad evidentiary base, while the results support interviews as a useful complement to written prosecution.

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

Performance Statistics

74.1%
Allow Rate
+4.1% vs TC avg
1,804
Total Applications
+17.7%
Interview Lift
873
Avg Prosecution Days
Based on 1770 resolved cases, 2023–2026

Rejection Statute Breakdown

0.9%
§101 Eligibility
26.0%
§102 Novelty
35.9%
§103 Obviousness
32.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19182768 ACTUATOR NOZZLE FOR AEROSOL PACKAGING, AND METHODS OF MAKING AND USING SUCH ACTUATOR NOZZLES AND AEROSOL PACKAGINGS Non-Final OA SOCIETE DES PRODUITS NESTLE S.A.
19169662 MOTORIZED TOILET SEAT Non-Final OA Kohler Co.
18284517 ATTACHMENT STRUCTURE IN WRITING INSTRUMENT, WRITING INSTRUMENT, AND SOFT MEMBER Non-Final OA KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)

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Frequently Asked Questions

What is examiner David J Walczak's allowance rate?

74.1% of resolved applications examined by David J Walczak were allowed (1,770 resolved cases), compared with 0.0% across Art Unit 3751 over the last five years.

Does an interview help with examiner David J Walczak?

This examiner's interview lift is +17.7 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 J Walczak take to allow a patent?

Applications allowed by David J Walczak took 873 days on average from filing to allowance.

Which art unit does examiner David J Walczak work in?

David J Walczak examines applications in Art Unit 3751 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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