Prosecution Insights
Last updated: October 26, 2026

John O Preston, USPTO Patent Examiner

Listed by the USPTO as PRESTON, JOHN O

Tech Center 3600 • Art Units: 3691 3693 3698

This examiner grants 28% of resolved cases

Analysis

John O. Preston serves in Art Unit 3691 within Tech Center 3600. The examiner has 394 resolved cases with an allowance rate of 28.4%. The median days to allowance is 1667. These metrics suggest that prosecution in this art unit involves a specific timeline and probability of success for applications assigned to this examiner.

The interview lift is 7.7%. This figure shows the difference in allowance outcomes for cases involving an interview. While the 28.4% allowance rate is the baseline, the 7.7% lift indicates that verbal communication can assist in advancing prosecution. The 1667 median days to allowance provides a benchmark for the 394 resolved cases recorded in this 3691 art unit.

Major companies such as Wells Fargo Bank, N.A., International Business Machines Corporation, and Synchrony Bank frequently appear before this examiner. Top firms like Alleman Hall LLP, CHIP LAW GROUP, and Foley IP Law, PLLC provide legal representation. These practitioners must account for the 28.4% allowance rate and the 1667 median days to allowance when developing their strategies.

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

Performance Statistics

28.4%
Allow Rate
-23.6% vs TC avg
434
Total Applications
+7.7%
Interview Lift
1667
Avg Prosecution Days
Based on 394 resolved cases, 2023–2026

Rejection Statute Breakdown

41.8%
§101 Eligibility
3.5%
§102 Novelty
47.4%
§103 Obviousness
5.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19049898 SYSTEMS AND METHODS FOR AN INTERACTIVE COMMUNICATION PLATFORM Final Rejection Wells Fargo Bank, N.A.
17541017 MULTI-PARTY INTERACTIONS FOR SENIOR LIVING ENGAGEMENT AND CARE SUPPORT PLATFORMS Final Rejection State Farm Mutual Automobile Insurance Company
18296716 System and Method for Token-based Transaction Processing Final Rejection Microsoft Technology Licensing, LLC
18518239 DISTRIBUTED LEDGER-BASED SECURING OF SHARED COLLATERAL ASSETS Final Rejection INTERNATIONAL BUSINESS MACHINES CORPORATION
18332267 PRIVACY-PRESERVING OVERDRAFT MANAGEMENT USING BLOCKCHAIN TECHNOLOGY Non-Final OA INTERNATIONAL BUSINESS MACHINES CORPORATION

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Who Appears Before This Examiner

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Frequently Asked Questions

What is examiner John O Preston's allowance rate?

28.4% of resolved applications examined by John O Preston were allowed (394 resolved cases), compared with 39.0% across Art Unit 3691 over the last five years.

Does an interview help with examiner John O Preston?

This examiner's interview lift is +7.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner John O Preston take to allow a patent?

Applications allowed by John O Preston took 1,667 days on average from filing to allowance.

Which art unit does examiner John O Preston work in?

John O Preston examines applications in Art Unit 3691 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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