Prosecution Insights
Last updated: October 26, 2026

Christopher Ashley Soto, USPTO Patent Examiner

Listed by the USPTO as SOTO, CHRISTOPHER ASHLEY

Tech Center 4100 • Art Units: 1731 1786 3723 4100

This examiner grants 53% of resolved cases

Analysis

SOTO, CHRISTOPHER ASHLEY is assigned to tech center 4100 and art unit 1731. The record includes 133 resolved cases, an allowance rate of 53.4%, and a median of 1097 days to allowance. The limited case volume calls for measured use of the profile, while the allowance rate shows outcomes divided relatively closely between allowance and non-allowance results.

Interviews are associated with a 25.5% lift in allowance rate, supporting their consideration in cases presenting substantive examination issues. Samsung Electronics Co., Ltd., Omachron Intellectual Property Inc., and Applied Materials Inc. are the leading companies. The listed firms are SMART & BIGGAR LP, STAAS & HALSEY LLP, and TUCKER ELLIS LLP.

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

Performance Statistics

53.4%
Allow Rate
-6.6% vs TC avg
195
Total Applications
+25.5%
Interview Lift
1097
Avg Prosecution Days
Based on 133 resolved cases, 2023–2026

Rejection Statute Breakdown

0%
§101 Eligibility
23.7%
§102 Novelty
48.7%
§103 Obviousness
25.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18440747 RETAINER RING MODULE AND CHEMICAL MECHANICAL POLISHING APPARATUS INCLUDING THE SAME Final Rejection SAMSUNG ELECTRONICS CO., LTD.
18238602 ROLLER ASSEMBLY AND VACUUM CLEANER INCLUDING THE SAME Non-Final OA Samsung Electronics Co., Ltd.
17982904 DUST CANISTER AND ROBOT VACUUM INCLUDING SAME Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
18767372 POWER TOOL AND AUXILIARY HANDLE THEREFOR Final Rejection MILWAUKEE ELECTRIC TOOL CORPORATION
18720841 PAD CONDITIONING BRUSH Final Rejection 3M INNOVATIVE PROPERTIES COMPANY
18630514 WASHER NOZZLE MOUNTING STRUCTURE FOR VEHICLE Final Rejection SUBARU CORPORATION
18590126 Wiper Blade Wear Indicator and System Final Rejection Illinois Tool Works Inc.
18278645 CLEANER HEAD Non-Final OA Dyson Technology Limited
18014506 VACUUM CLEANER Final Rejection Dyson Technology Limited
18611430 PROCESS CONTROL METHOD FOR PATTERN WAFER INDEX POLISHING Final Rejection Applied Materials, Inc.
17735623 WAFER FILM FRAME CARRIER Non-Final OA Applied Materials, Inc.
18441851 METHOD OF INFLATING ELASTIC MEMBRANE OF POLISHING HEAD, AND POLISHING HEAD SYSTEM Final Rejection EBARA CORPORATION

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Frequently Asked Questions

What is examiner Christopher Ashley Soto's allowance rate?

53.4% of resolved applications examined by Christopher Ashley Soto were allowed (133 resolved cases), compared with 55.4% across Art Unit 1731 over the last five years.

Does an interview help with examiner Christopher Ashley Soto?

This examiner's interview lift is +25.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Christopher Ashley Soto take to allow a patent?

Applications allowed by Christopher Ashley Soto took 1,097 days on average from filing to allowance.

Which art unit does examiner Christopher Ashley Soto work in?

Christopher Ashley Soto examines applications in Art Unit 1731 in Tech Center 4100.

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