Prosecution Insights
Last updated: October 04, 2026

Astellas Pharma Inc.

Technology area: Biotechnology & Pharmaceuticals

11 pending office actions • 6 art units • 10 examiners • 0 of 11 (0%) have an AI response strategy ready • 4 patents granted in the last 365 days

Analysis

Astellas Pharma Inc. maintains a portfolio with 11 pending office actions concentrated in the Biotechnology & Pharmaceuticals technology area. These actions are distributed across 6 distinct art units, indicating a diverse range of subject matter within the life sciences sector. The workload is spread among 10 distinct examiners, suggesting that the company encounters a variety of examination styles and interpretations of patent law.

WESTERBERG, NISSA M is identified as the busiest examiner for the portfolio, currently overseeing 2 pending cases. This represents a small portion of the 11 total pending office actions, highlighting a decentralized prosecution strategy where no single examiner dominates the company's legal landscape. The presence of 10 distinct examiners implies that the portfolio requires broad expertise to manage effectively.

Practitioners should note that while the busiest examiner has 2 pending actions, the remaining pending office actions are handled by different individuals. This distribution minimizes the risk of a single examiner's bias affecting the entire portfolio but increases the administrative complexity of tracking multiple simultaneous negotiations. Maintaining a consistent approach across 6 distinct art units is essential for this volume of work.

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

Portfolio Summary

11
Total Pending OAs
9
Non-Final OAs
2
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 4 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

4
Overdue
0
Due this week
0
Due this month
0
Due in next 60 days
0
Due later

Deadline Fire Line

Every pending office action with a known statutory deadline, placed on a days-until-due axis. Dots left of Today are overdue; the further right, the more runway. Cases that share a deadline window stack vertically. 4 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (4)

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.

5
Hard (45%)
5
Medium (45%)
1
Easy (9%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other3 (27%)
§103 only2 (18%)
§112 only1 (9%)
Double-patenting + other3 (27%)
Multi-statute (no §101)2 (18%)

Industry Mix

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

5
Life Sciences
45% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
1
Semiconductors
9% of docket
0
Mechanical / Eng
0% of docket
5
Business / Other
45% 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.

110 h
Manual time on pending OAs
22 h
Time saved (low, 20%)
38 h
Time saved (mid, 35%)
1.0 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
WESTERBERG, NISSA M 2 23.4% +37.1%
ELENISTE, PIERRE PAUL 1 35.5% +31.2%
MOORE, SUSANNA 1 68.1% +31.6%
WHITEMAN, BRIAN A 1 68.5% +16.7%
BAUER, BRIANNA LEE 1 100.0% +0.0%
FORRISTALL, JOSHUA L 1 63.9% +17.1%
SKELDING, ZACHARY S 1 59.7% +41.2%
OH, TAYLOR V 1 81.2% +15.3%
TRAN, CHRISTINA L 1 51.6% +48.2%
NATARAJAN, MEERA 1 62.5% +18.0%

Quick Wins (1)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18566516 METHODS OF USE OF PPAR AGONIST COMPOUNDS AND PHARMACEUTICAL COMPOSITIONS THEREOF BAUER, BRIANNA LEE —

Hard Cases (6)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 6 ordered by deadline are shown.

App #TitleExaminerDue in
17783591 ANTISENSE GUIDE RNA WITH ADDED FUNCTIONAL REGION FOR EDITING TARGET RNA TRAN, CHRISTINA L 117d overdue
18279103 Methods of Reducing Risk of Prostate Cancer Progression OH, TAYLOR V 17d overdue
18723117 SUBSTITUTED QUINOLINE DERIVATIVE MOORE, SUSANNA —
18710652 INDOCYANINE COMPOUND-CONTAINING SOLID PHARMACEUTICAL COMPOSITION WESTERBERG, NISSA M —
18291487 A PHARMACEUTICAL COMPOSITION FOR IMAGING WESTERBERG, NISSA M —
18269531 GUIDE RNA FOR EDITING POLYADENYLATION SIGNAL SEQUENCE OF TARGET RNA WHITEMAN, BRIAN A —

Interview Candidates (10)

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 8 ordered by deadline are shown.

App #TitleExaminerDue in
17783591 ANTISENSE GUIDE RNA WITH ADDED FUNCTIONAL REGION FOR EDITING TARGET RNA TRAN, CHRISTINA L 117d overdue
17632157 COMBINATION THERAPY INVOLVING ANTIBODIES AGAINST CLAUDIN 18.2 AND IMMUNE CHECKPOINT INHIBITORS FOR TREATMENT OF CANCER NATARAJAN, MEERA 31d overdue
18279103 Methods of Reducing Risk of Prostate Cancer Progression OH, TAYLOR V 17d overdue
18563354 MACHINE LEARNING METHODS TO PREDICT MENOPAUSE SYMPTOMS AND TREATMENT OPTIONS FORRISTALL, JOSHUA L 5d overdue
18845652 HETEROCYCLIC COMPOUND FOR INDUCING DEGRADATION OF G12D MUTANT KRAS PROTEIN ELENISTE, PIERRE PAUL —
18723117 SUBSTITUTED QUINOLINE DERIVATIVE MOORE, SUSANNA —
18710652 INDOCYANINE COMPOUND-CONTAINING SOLID PHARMACEUTICAL COMPOSITION WESTERBERG, NISSA M —
18291487 A PHARMACEUTICAL COMPOSITION FOR IMAGING WESTERBERG, NISSA M —

Top Art Units

Art UnitApps
1623 1
2857 1
1674 1
1625 1
1637 1
1643 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18845652 HETEROCYCLIC COMPOUND FOR INDUCING DEGRADATION OF G12D MUTANT KRAS PROTEIN ELENISTE, PIERRE PAUL — §112 Non-Final OA — Pending Sep 10, 2024
18723117 SUBSTITUTED QUINOLINE DERIVATIVE MOORE, SUSANNA — §101§112 Non-Final OA — Pending Jun 21, 2024
18710652 INDOCYANINE COMPOUND-CONTAINING SOLID PHARMACEUTICAL COMPOSITION WESTERBERG, NISSA M — §103§112 Non-Final OA — Pending May 16, 2024
18291487 A PHARMACEUTICAL COMPOSITION FOR IMAGING WESTERBERG, NISSA M — §103DP Non-Final OA — Pending Jan 23, 2024
18269531 GUIDE RNA FOR EDITING POLYADENYLATION SIGNAL SEQUENCE OF TARGET RNA WHITEMAN, BRIAN A — §101§102§103§112DP Non-Final OA — Pending Jan 19, 2024
18566516 METHODS OF USE OF PPAR AGONIST COMPOUNDS AND PHARMACEUTICAL COMPOSITIONS THEREOF BAUER, BRIANNA LEE 1623 §103§112DP Non-Final OA — Pending Dec 01, 2023
18563354 MACHINE LEARNING METHODS TO PREDICT MENOPAUSE SYMPTOMS AND TREATMENT OPTIONS FORRISTALL, JOSHUA L 2857 §103 Final Rejection 5d overdue Pending Nov 21, 2023
18552113 COMBINATION THERAPY INVOLVING ANTIBODIES AGAINST CLAUDIN 18.2 FOR TREATMENT OF CANCER SKELDING, ZACHARY S 1674 §102§112DP Non-Final OA — Pending Sep 22, 2023
18279103 Methods of Reducing Risk of Prostate Cancer Progression OH, TAYLOR V 1625 §102§103§112 Final Rejection 17d overdue Pending Aug 28, 2023
17783591 ANTISENSE GUIDE RNA WITH ADDED FUNCTIONAL REGION FOR EDITING TARGET RNA TRAN, CHRISTINA L 1637 §101§102§103 Non-Final OA 117d overdue Pending Jun 08, 2022
17632157 COMBINATION THERAPY INVOLVING ANTIBODIES AGAINST CLAUDIN 18.2 AND IMMUNE CHECKPOINT INHIBITORS FOR TREATMENT OF CANCER NATARAJAN, MEERA 1643 §103 Non-Final OA 31d overdue Pending Feb 01, 2022

Managing Astellas Pharma Inc.'s Patent Portfolio?

IP Author helps IP teams respond to office actions faster with AI-generated responses, examiner analytics, and prosecution intelligence.

Start Free Trial

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