Prosecution Insights
Last updated: October 27, 2026

Eduardo D Castilho, USPTO Patent Examiner

Listed by the USPTO as CASTILHO, EDUARDO D

Tech Center 3600 • Art Units: 3685 3698

This examiner grants 49% of resolved cases

Analysis

CASTILHO, EDUARDO D works in tech center 3600 and art unit 3685. The profile covers 316 resolved cases, with a 48.7% allowance rate and a 1422-day median to allowance. The 18.8% interview lift indicates that interviews have been associated with improved allowance outcomes, but the overall allowance record remains below a majority of resolved cases.

The principal companies are Nchain Licensing AG, Wells Fargo Bank, N.A., and American Express Travel Related Services Company, Inc. The leading firms are AEON Law, Burr & Forman LLP (Primary Customer Number), and CANTOR COLBURN LLP. The data supports careful preparation for extended prosecution, with interviews considered as a possible supplement to technically focused written responses.

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

Performance Statistics

48.7%
Allow Rate
-3.3% vs TC avg
337
Total Applications
+18.8%
Interview Lift
1422
Avg Prosecution Days
Based on 316 resolved cases, 2023–2026

Rejection Statute Breakdown

24.9%
§101 Eligibility
6.2%
§102 Novelty
35.7%
§103 Obviousness
30.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19358964 CONSTRAINTS ON OUTPUTS OF AN UNLOCKING TRANSACTION IN A BLOCKCHAIN Non-Final OA nChain Licensing AG
18402030 SYSTEMS AND METHODS FOR GENERATING A METAVERSE ASSET BASED ON SECURING A PHYSICAL OBJECT Non-Final OA Wells Fargo Bank, N.A.
19380174 HYPER-PERSONALIZED IDENTITY-BASED FINANCIAL SYSTEM Non-Final OA American Express Travel Related Services Company, Inc.
19259788 DECENTRALIZED STORAGE OF TRANSACTION DATA Final Rejection American Express Travel Related Services Company, Inc.

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Eduardo D Castilho's allowance rate?

48.7% of resolved applications examined by Eduardo D Castilho were allowed (316 resolved cases), compared with 40.6% across Art Unit 3685 over the last five years.

Does an interview help with examiner Eduardo D Castilho?

This examiner's interview lift is +18.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Eduardo D Castilho take to allow a patent?

Applications allowed by Eduardo D Castilho took 1,422 days on average from filing to allowance.

Which art unit does examiner Eduardo D Castilho work in?

Eduardo D Castilho examines applications in Art Unit 3685 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month