Prosecution Insights
Last updated: October 27, 2026

Maria C Santos-Diaz, USPTO Patent Examiner

Listed by the USPTO as SANTOS-DIAZ, MARIA C

Tech Center 3600 • Art Units: 3623 3628 3629 3689

This examiner grants 33% of resolved cases

Analysis

SANTOS-DIAZ, MARIA C is assigned to Tech Center 3600 and Art Unit 3623. The record includes 309 resolved cases, a 32.7% allowance rate, and a 31.4% interview lift. Median time to allowance is 1400 days. The case history supports a meaningful review of outcomes, while the reported figures indicate that prosecution planning should account for both allowance difficulty and examiner interaction.

Listed companies are The Toronto-dominion Bank, Assured Insurance Technologies, Inc., and Cardinal Health Inc. Listed firms are GREENBLUM & BERNSTEIN, P.L.C., Holland & Hart LLP, and Kilpatrick Townsend & Stockton LLP - West Coast. Their activity gives counsel practical reference points for financial, insurance, and healthcare matters in this Art Unit.

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

Performance Statistics

32.7%
Allow Rate
-19.3% vs TC avg
341
Total Applications
+31.4%
Interview Lift
1400
Avg Prosecution Days
Based on 309 resolved cases, 2023–2026

Rejection Statute Breakdown

26.5%
§101 Eligibility
20.7%
§102 Novelty
29.4%
§103 Obviousness
22.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18985248 Personalized Customer Surveys Using Machine Learning Final Rejection Oracle International Corporation
17483481 DYNAMIC MANAGEMENT OF COMPLIANCE WORKFLOW USING TRAINED MACHINE-LEARNING AND ARTIFICIAL-INTELLIGENCE PROCESSES Final Rejection The Toronto-Dominion Bank
19447581 SMART WASTING STATION FOR MEDICATIONS Non-Final OA CareFusion 303, Inc.
17900853 INFORMATION PROCESSOR AND INTERMEDIATION ASSISTANCE METHOD Final Rejection Hitachi, Ltd.
18396201 WAIT TIME RECOMMENDER Final Rejection Universal City Studios LLC
19143066 INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, AND PROGRAM Non-Final OA SEKISUI CHEMICAL CO., LTD.
18322162 CLOUD MES WITH EDGE CONTAINERIZED SERVICE Final Rejection Rockwell Automation Technologies, Inc.
18588514 SYSTEM AND METHOD FOR TENANT DEBT SETTLEMENT SYSTEM Final Rejection Entrata, 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 Maria C Santos-Diaz's allowance rate?

32.7% of resolved applications examined by Maria C Santos-Diaz were allowed (309 resolved cases), compared with 24.1% across Art Unit 3623 over the last five years.

Does an interview help with examiner Maria C Santos-Diaz?

This examiner's interview lift is +31.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Maria C Santos-Diaz take to allow a patent?

Applications allowed by Maria C Santos-Diaz took 1,400 days on average from filing to allowance.

Which art unit does examiner Maria C Santos-Diaz work in?

Maria C Santos-Diaz examines applications in Art Unit 3623 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