Prosecution Insights
Last updated: October 27, 2026

Joel Dillon Crandall, USPTO Patent Examiner

Listed by the USPTO as CRANDALL, JOEL DILLON

Tech Center 4100 • Art Units: 3723 3799 4100

This examiner grants 59% of resolved cases

Analysis

CRANDALL, JOEL DILLON is assigned to USPTO Technology Center 4100 and art unit 3723. The record contains 791 resolved cases, a 59.4% allowance rate, and a 21.8% interview lift. The median time to allowance is 1251 days. The data shows a substantial docket, a moderate allowance outcome, and a positive association between interviews and allowance.

The leading companies are Ebara Corporation, Applied Materials Inc., and Samsung Electronics Co., Ltd. The leading firms are BakerHostetler, BRAKE HUGHES BELLERMANN LLP, and Chrisman Gallo Tochtrop LLC. Applicants can use these recurring names to locate relevant prosecution experience and assess how similar technology owners have been represented.

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

Performance Statistics

59.4%
Allow Rate
-0.6% vs TC avg
823
Total Applications
+21.8%
Interview Lift
1251
Avg Prosecution Days
Based on 791 resolved cases, 2023–2026

Rejection Statute Breakdown

0.7%
§101 Eligibility
23.1%
§102 Novelty
45.8%
§103 Obviousness
29.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18428946 SUBSTRATE TREATING APPARATUS AND SUBSTRATE TREATING SYSTEM Non-Final OA Samsung Electronics Co., Ltd.
18633312 PLANARIZATION APPARATUS, PLANARIZATION METHOD, AND PRODUCT MANUFACTURING METHOD Non-Final OA CANON KABUSHIKI KAISHA
18713640 Tool Holding Device, Machine Tool, Machine Tool System, and Tool Means Non-Final OA Robert Bosch GmbH
18898988 PIPE PREPARATION TOOL Non-Final OA BLACK & DECKER INC.
18711957 DEVICE AND METHOD FOR MANUFACTURING PHOTOSYNTHESIS AND DEMULTIPLEXING CIRCUIT Non-Final OA NIPPON TELEGRAPH AND TELEPHONE CORPORATION
18711900 SUBSTRATE PROCESSING METHOD AND SUBSTRATE PROCESSING SYSTEM Non-Final OA Tokyo Electron Limited
18977686 TEMPERATURE CONTROL OF CHEMICAL MECHANICAL POLISHING Non-Final OA Applied Materials, Inc.
18632450 CONTACT CLEANING UNITS IN CMP POLISHER Non-Final OA Applied Materials, Inc.
18813172 FREE JOINT STRUCTURE, PUSH-PULL DEVICE, AND SUBSTRATE PROCESSING MODULE Non-Final OA EBARA CORPORATION
18840437 SUBSTRATE POLISHING APPARATUS Non-Final OA EBARA CORPORATION
18719028 INFORMATION PROCESSING APPARATUS, INFERENCE APPARATUS, MACHINE-LEARNING APPARATUS, INFORMATION PROCESSING METHOD, INFERENCE METHOD, AND MACHINE-LEARNING METHOD Non-Final OA EBARA CORPORATION
18666828 MACHINE TOOL, METHOD FOR MACHINE TOOL TO DETECT CONTACT BETWEEN GRINDSTONE AND WORKPIECE, AND COMPUTER-READABLE STORAGE MEDIUM Non-Final OA Yamazaki Mazak Corporation
18894292 METHOD OF PROCESSING WORKPIECE Non-Final OA DISCO CORPORATION

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Frequently Asked Questions

What is examiner Joel Dillon Crandall's allowance rate?

59.4% of resolved applications examined by Joel Dillon Crandall were allowed (791 resolved cases), compared with 56.5% across Art Unit 3723 over the last five years.

Does an interview help with examiner Joel Dillon Crandall?

This examiner's interview lift is +21.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Joel Dillon Crandall take to allow a patent?

Applications allowed by Joel Dillon Crandall took 1,251 days on average from filing to allowance.

Which art unit does examiner Joel Dillon Crandall work in?

Joel Dillon Crandall examines applications in Art Unit 3723 in Tech Center 4100.

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