Prosecution Insights
Last updated: October 25, 2026

Endo Biologics Limited

Technology area: Biotechnology & Pharmaceuticals

3 pending office actions • 3 art units • 3 examiners • 0 of 3 (0%) have an AI response strategy ready • 1 patents granted in the last 365 days

Analysis

Endo Biologics Limited has 3 pending office actions in the Biotechnology & Pharmaceuticals technology area. These 3 pending office actions are assigned to distinct examiners. The prosecution activity occurs across 3 distinct art units. This distribution across 3 distinct art units indicates that each case is handled within a different technical group.

TSAY, MARSHA M is the busiest examiner for the company. This examiner is responsible for 1 pending office action. The 1 pending office action is part of the work currently active in the Biotechnology & Pharmaceuticals technology area. The distinct examiners and the 3 distinct art units provide the technical review for the portfolio.

Practitioners should note the specific requirements of the distinct examiners and the 3 distinct art units involved. The 3 pending office actions represent the current volume of ongoing legal work. TSAY, MARSHA M and the other examiners manage the prosecution for the company. The Biotechnology & Pharmaceuticals technology area is the focus for these filings.

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

Portfolio Summary

3
Total Pending OAs
2
Non-Final OAs
1
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 (33%)
2
Medium (67%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 only1 (33%)
§103 only1 (33%)
Double-patenting + other1 (33%)

Industry Mix

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

3
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.

30 h
Manual time on pending OAs
6 h
Time saved (low, 20%)
10 h
Time saved (mid, 35%)
0.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
TSAY, MARSHA M 1 45.5% +52.8%
DICKENS, AMELIA NICOLE 1 47.2% +21.6%
BARRON, SEAN C 1 52.7% +30.4%

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
18763509 COMPOSITIONS AND METHODS FOR PRODUCING CLOSTRIDIAL COLLAGENASES BARRON, SEAN C —

Interview Candidates (3)

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 3 ordered by deadline are shown.

App #TitleExaminerDue in
19288143 Methods Of Treating Plantar Fibromatosis TSAY, MARSHA M —
19174127 Treatment Of Uterine Fibroids Using Purified Collagenase DICKENS, AMELIA NICOLE —
18763509 COMPOSITIONS AND METHODS FOR PRODUCING CLOSTRIDIAL COLLAGENASES BARRON, SEAN C —

Top Art Units

Art UnitApps
1656 1
1645 1
1653 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19288143 Methods Of Treating Plantar Fibromatosis TSAY, MARSHA M 1656 §103 Non-Final OA — Pending Aug 01, 2025
19174127 Treatment Of Uterine Fibroids Using Purified Collagenase DICKENS, AMELIA NICOLE 1645 §103§112DP Non-Final OA — Pending Apr 09, 2025
18763509 COMPOSITIONS AND METHODS FOR PRODUCING CLOSTRIDIAL COLLAGENASES BARRON, SEAN C 1653 §101 Final Rejection — Pending Jul 03, 2024

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Frequently Asked Questions

How many pending USPTO office actions does Endo Biologics Limited have?

Endo Biologics Limited has 3 pending office actions as of October 2026, spread across 3 art units and 3 examiners.

Which USPTO examiner handles the most Endo Biologics Limited applications?

Marsha M Tsay has the most, with 1 of Endo Biologics Limited's pending office actions.

What technology area are Endo Biologics Limited's patent applications in?

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

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