Prosecution Insights
Last updated: October 25, 2026

Daiichi Sankyo Company, Limited

Technology area: Biotechnology & Pharmaceuticals

14 pending office actions • 12 art units • 13 examiners • 0 of 14 (0%) have an AI response strategy ready • 21 patents granted in the last 365 days

Analysis

Daiichi Sankyo Company, Limited has 15 pending office actions in Biotechnology & Pharmaceuticals. The portfolio spans 13 distinct examiners and 12 distinct art units. GALSTER, SAMUEL LEONARD is the busiest examiner, with 2 pending matters, so the record reflects broad examiner and art-unit distribution with limited concentration in the busiest assignment.

This distribution calls for formal portfolio coordination, including consistent claim terminology, disclosure support, and tracking of examiner-specific issues. The difference between the number of pending actions and distinct examiners indicates that some examiner relationships cover more than one matter, while the art-unit count shows additional grouping at the technology-routing level. Counsel should use common technical positions where appropriate but preserve application-specific response records.

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

Portfolio Summary

14
Total Pending OAs
6
Non-Final OAs
7
Final Rejections
1
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 9 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

4
Overdue
1
Due this week
2
Due this month
1
Due in next 60 days
1
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. 9 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (4)Due ≤ 7 days (1)Due ≤ 30 days (2)Due ≤ 60 days (1)Due later (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 (21%)
9
Medium (64%)
2
Easy (14%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only5 (36%)
§112 only2 (14%)
Double-patenting + other4 (29%)
Multi-statute (no §101)3 (21%)

Industry Mix

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

14
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.

140 h
Manual time on pending OAs
28 h
Time saved (low, 20%)
49 h
Time saved (mid, 35%)
1.2 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
GALSTER, SAMUEL LEONARD 2 52.1% +42.2%
LIU, TRACY 1 54.5% +26.9%
GILL, RACHEL B 1 65.4% +28.8%
ANTHOPOLOS, PETER 1 57.4% +58.6%
TATGE, LEXUS MARC 1 25.0% +100.0%
PETRASH, HILARY ANN 1 65.6% +50.2%
ISMAIL, REHANA 1 76.2% +34.8%
LU, CHENG 1 53.8% +64.6%
PAK, YONG D 1 74.7% +14.2%
SKOKO III, JOHN JOSEPH 1 53.0% +55.2%

Hard Cases (4)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 4 ordered by deadline are shown.

App #TitleExaminerDue in
18016864 COMBINATION OF ANTI-HER2 ANTIBODY-DRUG CONJUGATE WITH HER DIMERIZATION INHIBITOR SKOKO III, JOHN JOSEPH 71d overdue
18265756 STABLE TARGET-EDITING GUIDE RNA TO WHICH CHEMICALLY MODIFIED NUCLEIC ACID IS INTRODUCED TATGE, LEXUS MARC 36d overdue
18263124 NOVEL METHOD FOR PRODUCING ANTIBODY-IMMUNOSTIMULATOR CONJUGATE GALSTER, SAMUEL LEONARD 6d
18562059 HTLV-1 NUCLEIC ACID LIPID PARTICLE VACCINE ANTHOPOLOS, PETER —

Interview Candidates (11)

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
18016864 COMBINATION OF ANTI-HER2 ANTIBODY-DRUG CONJUGATE WITH HER DIMERIZATION INHIBITOR SKOKO III, JOHN JOSEPH 71d overdue
18265756 STABLE TARGET-EDITING GUIDE RNA TO WHICH CHEMICALLY MODIFIED NUCLEIC ACID IS INTRODUCED TATGE, LEXUS MARC 36d overdue
18263124 NOVEL METHOD FOR PRODUCING ANTIBODY-IMMUNOSTIMULATOR CONJUGATE GALSTER, SAMUEL LEONARD 6d
18025896 A Scoring Method for an Anti-HER2 Antibody-Drug Conjugate Therapy LU, CHENG 21d
18252838 COMPLEX OF BETA-GLUCAN AND NUCLEIC ACID HAVING CONTROLLED PARTICLE SIZE GALSTER, SAMUEL LEONARD 22d
18249421 METHOD OF PRODUCING 3-METHYL-4-HALO-INDOLE DERIVATIVE ISMAIL, REHANA 35d
18708875 PHARMACEUTICAL COMPOSITION HAVING EXCELLENT DISSOLUTION PROPERTIES LIU, TRACY 62d
18561868 INFLUENZA VIRUS NUCLEIC ACID LIPID PARTICLE VACCINE GILL, RACHEL B —

Top Art Units

Art UnitApps
1693 2
1643 2
1614 1
1671 1
1611 1
1637 1
1644 1
1625 1
1642 1
1652 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18708875 PHARMACEUTICAL COMPOSITION HAVING EXCELLENT DISSOLUTION PROPERTIES LIU, TRACY 1614 §103 Non-Final OA 62d Pending May 09, 2024
18561868 INFLUENZA VIRUS NUCLEIC ACID LIPID PARTICLE VACCINE GILL, RACHEL B 1671 §103 Final Rejection — Pending Nov 17, 2023
18562059 HTLV-1 NUCLEIC ACID LIPID PARTICLE VACCINE ANTHOPOLOS, PETER 1611 §103§112 Non-Final OA — Pending Nov 17, 2023
18263124 NOVEL METHOD FOR PRODUCING ANTIBODY-IMMUNOSTIMULATOR CONJUGATE GALSTER, SAMUEL LEONARD 1693 §103§112 Non-Final OA 6d Pending Jul 26, 2023
18265756 STABLE TARGET-EDITING GUIDE RNA TO WHICH CHEMICALLY MODIFIED NUCLEIC ACID IS INTRODUCED TATGE, LEXUS MARC 1637 §103§112DP Non-Final OA 36d overdue Pending Jun 07, 2023
18252838 COMPLEX OF BETA-GLUCAN AND NUCLEIC ACID HAVING CONTROLLED PARTICLE SIZE GALSTER, SAMUEL LEONARD 1693 §103 Final Rejection 22d Pending May 12, 2023
18036289 COMBINATION OF ANTIBODY-DRUG CONJUGATE WITH ANTI-SIRPalpha ANTIBODY PETRASH, HILARY ANN 1644 §102§103§112DP Non-Final OA — Pending May 10, 2023
18249421 METHOD OF PRODUCING 3-METHYL-4-HALO-INDOLE DERIVATIVE ISMAIL, REHANA 1625 §112 Final Rejection 35d Pending Apr 18, 2023
18025896 A Scoring Method for an Anti-HER2 Antibody-Drug Conjugate Therapy LU, CHENG 1642 §112 Non-Final OA 21d Pending Mar 11, 2023
18024258 NOVEL ENDO-ß-N-ACETYLGLUCOSAMINIDASE PAK, YONG D 1652 §103 Non-Final OA — Pending Mar 01, 2023
18016864 COMBINATION OF ANTI-HER2 ANTIBODY-DRUG CONJUGATE WITH HER DIMERIZATION INHIBITOR SKOKO III, JOHN JOSEPH 1643 §102§103§112 Final Rejection 71d overdue Pending Jan 18, 2023
17625328 METHOD FOR PRODUCING INSULIN-PRODUCING CELL USING DIHYDROINDOLIZINONE DERIVATIVES BATES, KEENAN ALEXANDER 1631 §112DP Final Rejection — Pending Jan 06, 2022
17262590 EFFECTIVE METHOD FOR MANUFACTURING ANTIBODY-DRUG CONJUGATE VAN DRUFF, SYDNEY 1643 §103 Final Rejection 2d overdue Pending Jan 22, 2021
16640914 ANTIBODY-DRUG CONJUGATE PREPARATION AND LYOPHILIZATION FOR SAME KIM, YUNSOO 1641 §103DP Final Rejection 81d overdue Pending Feb 21, 2020

Managing Daiichi Sankyo Company, Limited'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

Frequently Asked Questions

How many pending USPTO office actions does Daiichi Sankyo Company, Limited have?

Daiichi Sankyo Company, Limited has 14 pending office actions as of October 2026, spread across 12 art units and 13 examiners.

Which USPTO examiner handles the most Daiichi Sankyo Company, Limited applications?

Samuel Leonard Galster has the most, with 2 of Daiichi Sankyo Company, Limited's pending office actions.

What technology area are Daiichi Sankyo Company, Limited's patent applications in?

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

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