Prosecution Insights
Last updated: October 26, 2026

Calvin L Hewitt II, USPTO Patent Examiner

Listed by the USPTO as HEWITT II, CALVIN L

Tech Center 3600 • Art Units: 3623 3625 3685 3692

This examiner grants 1% of resolved cases

Analysis

Calvin L. Hewitt II examines applications in Tech Center 3600 and Art Unit 3623. He has 70 resolved cases and a very low allowance rate of 1.4%. The median days to allowance is 1927. These metrics indicate an extremely challenging prosecution environment where grants are rare and time-consuming.

The interview lift is 6.0%, which provides a small increase in the probability of allowance compared to the 1.4% baseline. Given the 1927-day median pendency, applicants should be prepared for a prolonged engagement. Top companies include NEC Corporation, Mastercard International Incorporated, and TouchTunes Music Corporation. Frequent firms are Barta Jones, PLLC, McDermott Will & Schulte LLP, and NIXON & VANDERHYE, PC. These entities face a difficult path to grant, making the 6.0% lift a potentially vital, if small, advantage. Strategic planning should account for the 1.4% allowance rate when deciding whether to pursue prosecution. The 1927-day median is a critical benchmark for portfolio management.

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

Performance Statistics

1.4%
Allow Rate
-50.6% vs TC avg
77
Total Applications
+6.0%
Interview Lift
1927
Avg Prosecution Days
Based on 70 resolved cases, 2023–2026

Rejection Statute Breakdown

22.1%
§101 Eligibility
14.3%
§102 Novelty
37.1%
§103 Obviousness
25.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18724699 STORE INFORMATION DISPLAY SYSTEM, MOBILE TERMINAL, STORE INFORMATION DISPLAY METHOD, AND RECORDING MEDIUM Final Rejection NEC Corporation
18448105 DYNAMIC CUSTOMIZED INCENTIVES FOR INSTALLMENT PAYMENT PLANS Final Rejection MASTERCARD INTERNATIONAL INCORPORATED

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Frequently Asked Questions

What is examiner Calvin L Hewitt II's allowance rate?

1.4% of resolved applications examined by Calvin L Hewitt II were allowed (70 resolved cases), compared with 24.1% across Art Unit 3623 over the last five years.

Does an interview help with examiner Calvin L Hewitt II?

This examiner's interview lift is +6.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Calvin L Hewitt II take to allow a patent?

Applications allowed by Calvin L Hewitt II took 1,927 days on average from filing to allowance.

Which art unit does examiner Calvin L Hewitt II work in?

Calvin L Hewitt II examines applications in Art Unit 3623 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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