Prosecution Insights
Last updated: October 27, 2026

Derek S Chapel, USPTO Patent Examiner

Listed by the USPTO as CHAPEL, DEREK S

Tech Center 2800 • Art Units: 1781 2844 2872

This examiner grants 70% of resolved cases

Analysis

CHAPEL, DEREK S is assigned to tech center 2800 and art unit 1781, with 1003 resolved cases. The profile shows a 70.3% allowance rate and a median of 1038 days to allowance. The large case record supports using these figures as a meaningful description of the docket, while the timeline remains relevant to prosecution planning.

Interviews correspond with a 22.0% lift in the allowance rate. The listed companies are Envisics, Samsung Electronics, and Apple. The leading firms are MCDONNELL BOEHNEN HULBERT & BERGHOFF, ARENTFOX SCHIFF, and FOLEY & LARDNER. Applicants may find value in preparing interviews that distinguish the claimed optical or electronic features clearly, while preserving a fallback position in the written response.

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

Performance Statistics

70.3%
Allow Rate
+2.3% vs TC avg
1,027
Total Applications
+22.0%
Interview Lift
1038
Avg Prosecution Days
Based on 1003 resolved cases, 2023–2026

Rejection Statute Breakdown

1.3%
§101 Eligibility
24.1%
§102 Novelty
45.1%
§103 Obviousness
20.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19062925 DISPLAY APPARATUS Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
18829083 Folded Optics with Tilt Actuator and Spring Suspension Final Rejection Apple Inc.
18154089 REFLECTOR, METHOD FOR MANUFACTURING SAME, LENS MODULE AND ELECTRONIC DEVICE Non-Final OA HUAWEI TECHNOLOGIES CO., LTD.
18778855 DIRECT-WRITE LASER-ASSISTED ALTERING OF METASURFACES Non-Final OA University of Rochester
18894578 System for Automatically Adjusting Mirrors and Related Methods Non-Final OA ZF Friedrichshafen AG
18894640 CAMERA MODULE Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18269939 JONES MATRIX HOLOGRAPHY WITH METASURFACES Non-Final OA PRESIDENT AND FELLOWS OF HARVARD COLLEGE

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Frequently Asked Questions

What is examiner Derek S Chapel's allowance rate?

70.3% of resolved applications examined by Derek S Chapel were allowed (1,003 resolved cases), compared with 47.7% across Art Unit 1781 over the last five years.

Does an interview help with examiner Derek S Chapel?

This examiner's interview lift is +22.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Derek S Chapel take to allow a patent?

Applications allowed by Derek S Chapel took 1,038 days on average from filing to allowance.

Which art unit does examiner Derek S Chapel work in?

Derek S Chapel examines applications in Art Unit 1781 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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