Prosecution Insights
Last updated: October 25, 2026

Nagase & Co. Ltd.

Technology area: Biotechnology & Pharmaceuticals

2 pending office actions • 2 art units • 2 examiners • 0 of 2 (0%) have an AI response strategy ready • 2 patents granted in the last 365 days

Analysis

Nagase & Co. Ltd. is managing 2 pending office actions within the Biotechnology & Pharmaceuticals technology area. These actions are being handled by 2 distinct examiners. The prosecution is also split across 2 distinct art units, indicating that the company's active matters are being reviewed in different technical contexts within the patent office. This distribution shows that the company is pursuing at least two different technical paths simultaneously.

ZHANG SPIERING, DONGXIU is the busiest examiner for the company, with 1 busiest examiner pending action. Since there are 2 pending office actions and 2 distinct examiners, each examiner is responsible for 1 matter. This balanced distribution across 2 distinct art units shows that no single examiner handles more than 1 action for the company. The involvement of 2 distinct examiners in the Biotechnology & Pharmaceuticals sector suggests independent prosecution timelines for each matter.

Practitioners should expect potentially different examination hurdles for each of the 2 pending office actions. The lack of overlap in examiners or art units means that the outcomes of these actions may be independent of one another. This structure requires the company to manage two separate administrative tracks within the Biotechnology & Pharmaceuticals area, each with its own set of prior art and procedural requirements.

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

Portfolio Summary

2
Total Pending OAs
2
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 (50%)
0
Medium (0%)
1
Easy (50%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§112 only1 (50%)
Multi-statute (no §101)1 (50%)

Industry Mix

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

2
Life Sciences
100% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
0
Mechanical / Eng
0% 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.

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

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
ZHANG SPIERING, DONGXIU 1 41.2% +65.2%
RAMIREZ, DELIA M 1 65.1% +56.3%

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
18291346 STABILIZATION OF MYCOSPORINE-LIKE AMINO ACIDS ZHANG SPIERING, DONGXIU —

Interview Candidates (2)

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 2 ordered by deadline are shown.

App #TitleExaminerDue in
18291346 STABILIZATION OF MYCOSPORINE-LIKE AMINO ACIDS ZHANG SPIERING, DONGXIU —
18548369 ERGOTHIONEINE PRODUCTION METHOD RAMIREZ, DELIA M —

Top Art Units

Art UnitApps
1616 1
1652 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18291346 STABILIZATION OF MYCOSPORINE-LIKE AMINO ACIDS ZHANG SPIERING, DONGXIU 1616 §103§112 Non-Final OA — Pending Jan 23, 2024
18548369 ERGOTHIONEINE PRODUCTION METHOD RAMIREZ, DELIA M 1652 §112 Non-Final OA — Pending Aug 30, 2023

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Frequently Asked Questions

How many pending USPTO office actions does Nagase & Co. Ltd. have?

Nagase & Co. Ltd. has 2 pending office actions as of October 2026, spread across 2 art units and 2 examiners.

Which USPTO examiner handles the most Nagase & Co. Ltd. applications?

Dongxiu Zhang Spiering has the most, with 1 of Nagase & Co. Ltd.'s pending office actions.

What technology area are Nagase & Co. Ltd.'s patent applications in?

Mostly Biotechnology & Pharmaceuticals (USPTO Tech Center 1600), based on where its pending office actions are examined.

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