Prosecution Insights
Last updated: October 26, 2026

Constantine B Siozopoulos, USPTO Patent Examiner

Listed by the USPTO as SIOZOPOULOS, CONSTANTINE B

Tech Center 3700 • Art Units: 3683 3686 3792

This examiner grants 58% of resolved cases

Analysis

SIOZOPOULOS, CONSTANTINE B works in Tech Center 3700 and art unit 3683. The profile covers 181 resolved cases and an allowance rate of 57.5%. Interview activity is associated with a 39.6% lift, a meaningful measure alongside the allowance rate. The median time to allowance is 1097 days, so practitioners should account for prosecution duration when evaluating amendments, continuations, and business timing.

The listed companies are KPN Innovations LLC, Apple Inc., and NEC Corporation. The listed firms are CALDWELL LLC, BAKER BOTTS L.L.P., and HAUPTMAN HAM, LLP. The portfolio names give applicants a concrete context for the examiner’s represented work. Focused interviews, supported by technically specific claim positions, may be worth considering where the record presents issues suitable for direct discussion.

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

Performance Statistics

57.5%
Allow Rate
-12.5% vs TC avg
216
Total Applications
+39.6%
Interview Lift
1097
Avg Prosecution Days
Based on 181 resolved cases, 2023–2026

Rejection Statute Breakdown

52.1%
§101 Eligibility
19.9%
§102 Novelty
20.7%
§103 Obviousness
4.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19310090 Jaw Health Metric Using Headphones Final Rejection Apple Inc.
18723948 REHABILITATION MENU DETERMINATION ASSISTANCE APPARATUS, SYSTEM, METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING PROGRAM THEREFOR Final Rejection NEC Corporation
18274736 MEDICAL SYSTEM FOR VENTILATION AND IMAGING Final Rejection KONINKLIJKE PHILIPS N.V.

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Frequently Asked Questions

What is examiner Constantine B Siozopoulos's allowance rate?

57.5% of resolved applications examined by Constantine B Siozopoulos were allowed (181 resolved cases), compared with 26.9% across Art Unit 3683 over the last five years.

Does an interview help with examiner Constantine B Siozopoulos?

This examiner's interview lift is +39.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Constantine B Siozopoulos take to allow a patent?

Applications allowed by Constantine B Siozopoulos took 1,097 days on average from filing to allowance.

Which art unit does examiner Constantine B Siozopoulos work in?

Constantine B Siozopoulos examines applications in Art Unit 3683 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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