Prosecution Insights
Last updated: October 01, 2026

Examiner: CHAPPELL, DANIEL C

Tech Center 2100 • Art Units: 2135 2139 2185

This examiner grants 81% of resolved cases

Analysis

Daniel C. Chappell operates in Tech Center 2100 and Art Unit 2135, with 614 resolved cases. His allowance rate is 80.8%, and the median days to allowance is 841. These figures provide a clear expectation for the duration and likely outcome of the prosecution cycle.

One of the most striking features of this profile is the interview lift of 45.8%. This lift indicates that interviews are a powerful tool for overcoming rejections and securing an allowance with this examiner. Practitioners should consider the impact of the 45.8% lift, as the data from 614 resolved cases suggests that direct communication is a key factor in success. Even with an 80.8% allowance rate, the lift shows that an interview can significantly change the trajectory of a case. The 841 median days to allowance further confirms the timing for cases moving through the system.

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
627
Total Applications
+45.8%
Interview Lift
841
Avg Prosecution Days
Based on 614 resolved cases, 2023–2026

Rejection Statute Breakdown

6.4%
§101 Eligibility
12.7%
§102 Novelty
49.2%
§103 Obviousness
23.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19213100 HOST MANAGEMENT METHOD AND APPARATUS Non-Final OA Huawei Cloud Computing Technologies Co., Ltd.
19054361 Storage System and Scheduling Method Final Rejection Huawei Cloud Computing Technologies Co., Ltd.
19052107 DECODERS, DECODING METHODS, MEMORY SYSTEMS, AND OPERATING METHODS AND CONTROLLERS THEREOF Final Rejection YANGTZE MEMORY TECHNOLOGIES CO., LTD.
19116940 METHOD, SYSTEM, AND STORAGE MEDIUM FOR COMPOSING DSS (DISTRIBUTED STORAGE SYSTEM) NODE Non-Final OA Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
19109001 Method for Reorganizing Fragmented Files, Management Device, Flash Memory Device, and Terminal Final Rejection Honor Device Co., Ltd.
19208097 STORAGE DEVICE TRANSLATING LOGICAL ADDRESS ON THE BASIS OF SEQUENTIALITY OF NAMESPACE, AND METHOD THEREOF Non-Final OA SK hynix Inc.
19225640 Managing Shared Resource Usage in Networked Storage Systems Non-Final OA NETAPP, INC.
19232658 LOCALIZED AND RELOCATABLE SOFTWARE PLACEMENT AND NOC-BASED ACCESS TO MEMORY CONTROLLERS Non-Final OA Xilinx, Inc.
19033889 PROTECTING DATA IN AN UNLOCKED STORAGE DEVICE Final Rejection Sandisk Technologies, Inc.

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