Prosecution Insights
Last updated: October 27, 2026

Xiao Si Zhao, USPTO Patent Examiner

Listed by the USPTO as ZHAO, XIAO SI

Tech Center 2800 • Art Units: 1712 1714 1744 1792 2872

This examiner grants 58% of resolved cases

Analysis

ZHAO, XIAO SI has resolved 488 cases in Tech Center 2800 and Art Unit 1712. The allowance rate is 58.0%, while the interview lift is 24.6%. The median time to allowance is 1213 days. The record shows allowances in more than half of resolved cases, with interviews associated with a moderate reported effect on outcomes.

The listed companies are Seiko Epson Corporation, Arizona Board of Regents on Behalf of Arizona State University, and Semes Co., Ltd. The leading firms are Bridgeway IP Law Group, PLLC, HARNESS DICKEY (DETROIT), and PNJ IP Law, P.C. These associations provide useful context for university, corporate, and semiconductor filings.

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

Performance Statistics

58.0%
Allow Rate
-10.0% vs TC avg
503
Total Applications
+24.6%
Interview Lift
1213
Avg Prosecution Days
Based on 488 resolved cases, 2023–2026

Rejection Statute Breakdown

1.0%
§101 Eligibility
12.4%
§102 Novelty
55.7%
§103 Obviousness
25.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18320448 Plasticizing Device, Injection Molding Device, And Three-Dimensional Modeling Device Non-Final OA SEIKO EPSON CORPORATION
18170950 MULTIPHASE DIRECT INK WRITING FOR MULTILAYERED COMPOSITES Non-Final OA ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
18108655 NOZZLE HAVING DOUBLE PIPE STRUCTURE, AND PHOTORESIST DISPENSER AND SPIN COATER, EACH INCLUDING THE NOZZLE Final Rejection SEMES CO., LTD.

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 Xiao Si Zhao's allowance rate?

58.0% of resolved applications examined by Xiao Si Zhao were allowed (488 resolved cases), compared with 43.3% across Art Unit 1712 over the last five years.

Does an interview help with examiner Xiao Si Zhao?

This examiner's interview lift is +24.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Xiao Si Zhao take to allow a patent?

Applications allowed by Xiao Si Zhao took 1,213 days on average from filing to allowance.

Which art unit does examiner Xiao Si Zhao work in?

Xiao Si Zhao examines applications in Art Unit 1712 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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