Prosecution Insights
Last updated: October 04, 2026

Eisai R&D Management Co., Ltd.

Technology area: Biotechnology & Pharmaceuticals

11 pending office actions • 7 art units • 11 examiners • 0 of 11 (0%) have an AI response strategy ready • 16 patents granted in the last 365 days

Analysis

Eisai R&D Management Co., Ltd. is currently prosecuting 11 pending office actions within the Biotechnology & Pharmaceuticals technology area. These 11 matters are spread across 7 distinct art units, reflecting the complex nature of pharmaceutical patenting. There are 11 distinct examiners assigned to these cases, resulting in a ratio of 1 examiner to each pending action. This distribution across 7 art units suggests that the 11 pending actions cover a variety of biotechnological sub-fields. Each action will be decided by a different individual at the patent office.

The busiest examiner, LEWIS, CAMRYN BROOKE, is responsible for 1 pending office action. Because each of the 11 examiners holds only 1 action, the company faces 11 unique sets of examiner expectations. There is no concentration of cases, as the 11 distinct examiners each manage a single pending matter. Practitioners should develop 11 individualized strategies to address the 11 pending office actions. The 7 distinct art units provide the technical framework for these 11 separate prosecution paths.

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

Portfolio Summary

11
Total Pending OAs
7
Non-Final OAs
4
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 3 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

2
Overdue
0
Due this week
0
Due this month
1
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. 3 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (2)Due ≤ 60 days (1)

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.

3
Hard (27%)
7
Medium (64%)
1
Easy (9%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other1 (9%)
§103 only4 (36%)
§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.

6
Life Sciences
55% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
1
Mechanical / Eng
9% of docket
4
Business / Other
36% 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
LEWIS, CAMRYN BROOKE 1 5.0% +11.1%
JARRELL, NOBLE E 1 81.1% +9.7%
CHEN, PO-CHIH 1 74.2% +14.8%
JAVANMARD, SAHAR 1 64.8% +34.1%
LEE, YIE CHIA 1 69.2% +46.6%
ROONEY, NORA MAUREEN 1 60.3% +23.6%
SIMMONS, CHRIS E 1 34.1% +19.4%
ISMAIL, REHANA 1 75.8% +34.8%
BERHANE, SELAM 1 58.4% +56.7%
BUTTICE, AUDREY L 1 47.9% +25.9%

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
18863738 SOLID FORM OF PPAR-GAMMA MODULATORS AND METHODS OF USE JARRELL, NOBLE E —

Hard Cases (3)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 3 ordered by deadline are shown.

App #TitleExaminerDue in
18028039 PHARMACEUTICAL COMPOSITION ROONEY, NORA MAUREEN 133d overdue
17757825 METHOD FOR PRODUCING ERIBULIN-BASED ANTIBODY-DRUG CONJUGATE BUTTICE, AUDREY L 37d overdue
19161653 INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, PROGRAM, AND STORAGE MEDIUM LEWIS, CAMRYN BROOKE —

Interview Candidates (9)

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
18028039 PHARMACEUTICAL COMPOSITION ROONEY, NORA MAUREEN 133d overdue
17757825 METHOD FOR PRODUCING ERIBULIN-BASED ANTIBODY-DRUG CONJUGATE BUTTICE, AUDREY L 37d overdue
18188716 EZH2 INHIBITORS FOR TREATING LYMPHOMA SIMMONS, CHRIS E 42d
19161653 INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, PROGRAM, AND STORAGE MEDIUM LEWIS, CAMRYN BROOKE —
18846909 PHARMACEUTICAL COMPOSITION FOR TREATMENT OF PARKINSON'S DISEASE CHEN, PO-CHIH —
18722917 CRYSTAL OF SUBSTITUTED PIPERIDINE COMPOUND, SALTS OF SUBSTITUTED PIPERIDINE COMPOUND, AND CRYSTALS THEREOF JAVANMARD, SAHAR —
18577174 BIOMARKERS FOR ALZHEIMER'S DISEASE TREATMENT LEE, YIE CHIA —
18009115 METHODS FOR TREATING CANCER OR VON-HIPPEL LINDAU DISEASE USING A COMBINATION OF A HIF-2 ALPHA INHIBITOR AND LENVATINIB ISMAIL, REHANA —

Top Art Units

Art UnitApps
3683 1
1641 1
1622 1
1625 1
1675 1
1647 1
1628 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19161653 INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, PROGRAM, AND STORAGE MEDIUM LEWIS, CAMRYN BROOKE 3683 §101§103§112 Non-Final OA — Pending Sep 02, 2025
18863738 SOLID FORM OF PPAR-GAMMA MODULATORS AND METHODS OF USE JARRELL, NOBLE E — §112 Non-Final OA — Pending Nov 07, 2024
18846909 PHARMACEUTICAL COMPOSITION FOR TREATMENT OF PARKINSON'S DISEASE CHEN, PO-CHIH — §103 Non-Final OA — Pending Sep 13, 2024
18722917 CRYSTAL OF SUBSTITUTED PIPERIDINE COMPOUND, SALTS OF SUBSTITUTED PIPERIDINE COMPOUND, AND CRYSTALS THEREOF JAVANMARD, SAHAR — §103Other Non-Final OA — Pending Jun 21, 2024
18577174 BIOMARKERS FOR ALZHEIMER'S DISEASE TREATMENT LEE, YIE CHIA — §103§112DP Non-Final OA — Pending Jan 05, 2024
18028039 PHARMACEUTICAL COMPOSITION ROONEY, NORA MAUREEN 1641 §103§112 Final Rejection 133d overdue Pending Mar 23, 2023
18188716 EZH2 INHIBITORS FOR TREATING LYMPHOMA SIMMONS, CHRIS E 1622 §103Other Non-Final OA 42d Pending Mar 23, 2023
18009115 METHODS FOR TREATING CANCER OR VON-HIPPEL LINDAU DISEASE USING A COMBINATION OF A HIF-2 ALPHA INHIBITOR AND LENVATINIB ISMAIL, REHANA 1625 §103DP Final Rejection — Pending Dec 08, 2022
17906660 HIGH CONCENTRATION ANTI-Abeta PROTOFIBRIL ANTIBODY FORMULATIONS AND METHODS OF USE THEREOF BERHANE, SELAM 1675 §103 Final Rejection — Pending Sep 19, 2022
17757825 METHOD FOR PRODUCING ERIBULIN-BASED ANTIBODY-DRUG CONJUGATE BUTTICE, AUDREY L 1647 §102§103Other Final Rejection 37d overdue Pending Jun 21, 2022
17757672 USE OF LEMBOREXANT FOR TREATING INSOMNIA MOU, LIYUAN 1628 §103DP Non-Final OA — Pending Jun 17, 2022

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