Prosecution Insights
Last updated: October 25, 2026

Chang-Tzu Chen

Technology area: Medical Devices & Mechanical Engineering

1 pending office actions • 1 art units • 1 examiners • 0 of 1 (0%) have an AI response strategy ready

Analysis

Chang-Tzu Chen maintains a focused presence in the Medical Devices & Mechanical Engineering technology area. The company currently has 1 pending office action. This action is being handled by a distinct examiner within 1 distinct art unit. This indicates a very specific and singular point of interaction with the patent office at this time. This concentration allows for a streamlined approach to patent strategy, as the applicant only needs to navigate the specific requirements of the involved administrative unit.

DANIEL, ANTARIUS S is the busiest examiner for this portfolio, managing 1 busiest examiner pending office action. Since there is only a single pending action in total, this examiner is responsible for the company's entire active prosecution. Practitioners should focus on the specific requirements of this examiner and the 1 distinct art unit involved to move the application toward allowance. The lack of diversity in examiners and units means that the outcome of this specific action will significantly impact the company's current patent standing. Understanding the specific examination history and preferences of this official is crucial for successfully advancing the company's intellectual property interests in the medical device field.

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

Portfolio Summary

1
Total Pending OAs
1
Non-Final OAs
0
Final Rejections
0
Advisory / Quayle

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

1
Hard (100%)
0
Medium (0%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
Multi-statute (no §101)1 (100%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

0
Life Sciences
0% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
1
Mechanical / Eng
100% of docket
0
Business / Other
0% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

10 h
Manual time on pending OAs
2 h
Time saved (low, 20%)
4 h
Time saved (mid, 35%)
0.1 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
DANIEL, ANTARIUS S 1 52.0% +14.4%

Hard Cases (1)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18598146 FREEZE-DRY POWDER INJECTOR RESTORING DEVICE DANIEL, ANTARIUS S —

Interview Candidates (1)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18598146 FREEZE-DRY POWDER INJECTOR RESTORING DEVICE DANIEL, ANTARIUS S —

Top Art Units

Art UnitApps
3783 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18598146 FREEZE-DRY POWDER INJECTOR RESTORING DEVICE DANIEL, ANTARIUS S 3783 §102§112 Non-Final OA — Pending Mar 07, 2024

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Frequently Asked Questions

How many pending USPTO office actions does Chang-Tzu Chen have?

Chang-Tzu Chen has 1 pending office actions as of October 2026, spread across 1 art units and 1 examiners.

Which USPTO examiner handles the most Chang-Tzu Chen applications?

Antarius S Daniel has the most, with 1 of Chang-Tzu Chen's pending office actions.

What technology area are Chang-Tzu Chen's patent applications in?

Mostly Medical Devices & Mechanical Engineering (USPTO Tech Center 3700), based on where its pending office actions are examined.

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