Prosecution Insights
Last updated: October 25, 2026

Ligand Pharmaceuticals Incorporated

Technology area: Biotechnology & Pharmaceuticals

3 pending office actions • 3 art units • 3 examiners • 0 of 3 (0%) have an AI response strategy ready • 2 patents granted in the last 365 days

Analysis

Ligand Pharmaceuticals Incorporated is managing 4 pending office actions in the Biotechnology & Pharmaceuticals technology area. These actions are distributed among 4 distinct examiners and 3 distinct art units. This distribution shows that the company's pharmaceutical innovations are being evaluated by a diverse group of examiners across multiple specialized units within the biotechnology sector. The involvement of 3 distinct art units indicates that the pending office actions cover a range of specific biological or chemical sub-fields.

The busiest examiner is ARNOLD, ERNST V, who has 1 pending office action. Because every pending matter is assigned to a different person, each case is being reviewed by a different individual. This requires the applicant to adapt to different examiner styles while coordinating responses across the various art units. The lack of examiner overlap means that successful strategies used with one examiner may not directly translate to the others, necessitating a customized approach for each of the 1 pending office action cases.

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

Portfolio Summary

3
Total Pending OAs
1
Non-Final OAs
2
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
§103 only1 (33%)
Double-patenting + other1 (33%)
Multi-statute (no §101)1 (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
ARNOLD, ERNST V 1 48.2% +12.8%
CHO, DAVID H 1 31.9% +67.0%
BASQUILL, SEAN M 1 38.8% +21.7%

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
18719012 NITRIC OXIDE-RELEASING NASAL COMPOSITIONS AND METHODS OF USE THEREOF ARNOLD, ERNST V —

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
18719012 NITRIC OXIDE-RELEASING NASAL COMPOSITIONS AND METHODS OF USE THEREOF ARNOLD, ERNST V —
18706719 CYCLIC PHOSPHORAMIDATE COMPOUNDS CHO, DAVID H —
17675654 TOPICAL COMPOSITIONS AND METHODS OF USING THE SAME BASQUILL, SEAN M —

Top Art Units

Art UnitApps
1613 1
1693 1
1614 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18719012 NITRIC OXIDE-RELEASING NASAL COMPOSITIONS AND METHODS OF USE THEREOF ARNOLD, ERNST V 1613 §102§103§112 Final Rejection — Pending Jun 12, 2024
18706719 CYCLIC PHOSPHORAMIDATE COMPOUNDS CHO, DAVID H 1693 §102§103§112DP Non-Final OA — Pending May 01, 2024
17675654 TOPICAL COMPOSITIONS AND METHODS OF USING THE SAME BASQUILL, SEAN M 1614 §103 Final Rejection — Pending Feb 18, 2022

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Frequently Asked Questions

How many pending USPTO office actions does Ligand Pharmaceuticals Incorporated have?

Ligand Pharmaceuticals Incorporated has 3 pending office actions as of October 2026, spread across 3 art units and 3 examiners.

Which USPTO examiner handles the most Ligand Pharmaceuticals Incorporated applications?

Ernst V Arnold has the most, with 1 of Ligand Pharmaceuticals Incorporated's pending office actions.

What technology area are Ligand Pharmaceuticals Incorporated's patent applications in?

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

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