Prosecution Insights
Last updated: October 27, 2026

Daniel C Chappell, USPTO Patent Examiner

Listed by the USPTO as CHAPPELL, DANIEL C

Tech Center 2100 • Art Units: 2135 2139 2185

This examiner grants 81% of resolved cases

Analysis

CHAPPELL, DANIEL C handles cases in tech center 2100 and art unit 2135. The record includes 616 resolved cases, an 80.8% allowance rate, and a median of 840 days to allowance. The figures show a comparatively frequent allowance outcome within a timeline that remains important for prosecution scheduling.

The interview lift is 45.4%, indicating a strong association between interviews and allowance in the recorded profile. Listed companies are Huawei Cloud Computing Technologies, Intel, and Kinaxis. The leading firms are AGORA LAW GROUP, Compass IP Law, and CONLEY ROSE. Practitioners may consider using examiner interviews early enough to clarify technical distinctions, then confirming any agreed claim direction in the written record.

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

Performance Statistics

80.8%
Allow Rate
+25.8% vs TC avg
640
Total Applications
+45.4%
Interview Lift
840
Avg Prosecution Days
Based on 616 resolved cases, 2023–2026

Rejection Statute Breakdown

6.5%
§101 Eligibility
12.8%
§102 Novelty
49.1%
§103 Obviousness
24.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19213100 HOST MANAGEMENT METHOD AND APPARATUS Non-Final OA Huawei Cloud Computing Technologies Co., Ltd.
19193532 OBJECT STORAGE SERVICE-BASED STORAGE METHOD AND APPARATUS Final Rejection HUAWEI CLOUD COMPUTING TECHNOLOGIES CO., LTD
19054361 Storage System and Scheduling Method Final Rejection Huawei Cloud Computing Technologies Co., Ltd.
18241458 METHOD AND APPARATUS TO REDUCE LATENCY OF A MEMORY-SIDE CACHE Non-Final OA Intel Corporation
19090874 DATA PLACEMENT WITH NAMESPACE GRANULARITY IN A MEMORY SUB-SYSTEM Final Rejection MICRON TECHNOLOGY, INC.
19116940 METHOD, SYSTEM, AND STORAGE MEDIUM FOR COMPOSING DSS (DISTRIBUTED STORAGE SYSTEM) NODE Non-Final OA Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
19169920 MEMORY ARRAY PAGE TABLE WALK Final Rejection Lodestar Licensing Group LLC
19225640 Managing Shared Resource Usage in Networked Storage Systems Non-Final OA NETAPP, INC.
19208097 STORAGE DEVICE TRANSLATING LOGICAL ADDRESS ON THE BASIS OF SEQUENTIALITY OF NAMESPACE, AND METHOD THEREOF Non-Final OA SK hynix Inc.
19033889 PROTECTING DATA IN AN UNLOCKED STORAGE DEVICE Final Rejection Sandisk Technologies, Inc.

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Who Appears Before This Examiner

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Frequently Asked Questions

What is examiner Daniel C Chappell's allowance rate?

80.8% of resolved applications examined by Daniel C Chappell were allowed (616 resolved cases), compared with 73.0% across Art Unit 2135 over the last five years.

Does an interview help with examiner Daniel C Chappell?

This examiner's interview lift is +45.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Daniel C Chappell take to allow a patent?

Applications allowed by Daniel C Chappell took 840 days on average from filing to allowance.

Which art unit does examiner Daniel C Chappell work in?

Daniel C Chappell examines applications in Art Unit 2135 in Tech Center 2100 (Computing & Software).

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