Prosecution Insights
Last updated: October 26, 2026

Cheukfan Lee, USPTO Patent Examiner

Listed by the USPTO as LEE, CHEUKFAN

Tech Center 2600 • Art Units: 2625 2673 2674 2676 2682 2683

This examiner grants 81% of resolved cases

Analysis

LEE, CHEUKFAN has 719 resolved cases and an 80.7% allowance rate. The interview lift is 7.0%, and the median time to allowance is 960 days. The record is assigned to Tech Center 2600 and Art Unit 2625. The allowance rate reflects a favorable resolved-case outcome, while the positive interview lift indicates a more limited but still measurable role for interviews. The 960-day median should be considered in docket management.

Recurring applicants include Canon Inc., Kyocera Document Solutions Inc., and Fujifilm Holdings Corporation. The leading firms are Venable LLP, HARNESS DICKEY (DETROIT), and MILLEN, WHITE, ZELANO & BRANIGAN, P.C. This applicant and counsel mix gives practitioners a useful view of the imaging and document-technology context represented in the docket.

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

Performance Statistics

80.7%
Allow Rate
+18.7% vs TC avg
730
Total Applications
+7.0%
Interview Lift
960
Avg Prosecution Days
Based on 719 resolved cases, 2023–2026

Rejection Statute Breakdown

2.8%
§101 Eligibility
26.9%
§102 Novelty
40.8%
§103 Obviousness
22.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18778950 IMAGE READING APPARATUS AND IMAGE FORMING SYSTEM Non-Final OA CANON KABUSHIKI KAISHA
18413498 TECHNIQUE FOR EXECUTING CALIBRATION IN IMAGE FORMING APPARATUS Non-Final OA CANON KABUSHIKI KAISHA
18608023 METHODS FOR INTEGRATED RESOURCE MANAGEMENT IN A PRINTING SYSTEM Final Rejection Kyocera Document Solutions Inc.

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Frequently Asked Questions

What is examiner Cheukfan Lee's allowance rate?

80.7% of resolved applications examined by Cheukfan Lee were allowed (719 resolved cases), compared with 66.5% across Art Unit 2625 over the last five years.

Does an interview help with examiner Cheukfan Lee?

This examiner's interview lift is +7.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Cheukfan Lee take to allow a patent?

Applications allowed by Cheukfan Lee took 960 days on average from filing to allowance.

Which art unit does examiner Cheukfan Lee work in?

Cheukfan Lee examines applications in Art Unit 2625 in Tech Center 2600 (Communications).

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