Prosecution Insights
Last updated: May 29, 2026

Chugai Seiyaku Kabushiki Kaisha

40 pending office actions • 22 art units • 34 examiners • 0 of 40 (0%) have an AI response strategy ready • 55 patents granted in the last 365 days

Portfolio Summary

40
Total Pending OAs
26
Non-Final OAs
11
Final Rejections
3
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 40 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

29
Overdue
0
Due this week
7
Due this month
2
Due in next 60 days
2
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. 40 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (29)Due ≤ 30 days (7)Due ≤ 60 days (2)Due later (2)

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.

0
Hard (0%)
21
Medium (52%)
6
Easy (15%)
13
Unknown (32%)

Rejection Statute Mix

BucketCases
§103 only17 (42%)
§102 only4 (10%)
§112 only6 (15%)
No statute on record13 (32%)

Industry Mix

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

39
Life Sciences
98% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
1
Mechanical / Eng
2% 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.

400 h
Manual time on pending OAs
80 h
Time saved (low, 20%)
140 h
Time saved (mid, 35%)
3.5 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
BRISTOL, LYNN ANNE 3 63.7% +39.7%
RYAN, DOUGLAS CHARLES 2 40.0% +48.9%
LANDSMAN, ROBERT S 2 81.3% +12.9%
CHASE, CAROL ANN 2 44.6% +83.5%
SANG, HONG 2 54.7% +61.8%
O DELL, DAVID K 1 57.8% +35.8%
ALLEN, MARIANNE P 1 59.8% +18.5%
NESTOR, DONNA MICHELLE 1 57.5% +43.9%
CHONG, YONG SOO 1 43.7% +41.6%
WILLIS, DOUGLAS M 1 82.6% +19.7%

Quick Wins (2)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 2 ordered by deadline are shown.

App #TitleExaminerDue in
18023246 PHARMACEUTICAL COMPOSITION FOR PREVENTION AND/OR TREATMENT OF DIALYSIS PRURITUS CONTAINING IL-31 ANTAGONIST AS ACTIVE INGREDIENT LANDSMAN, ROBERT S 124d overdue
18458292 THERAPEUTIC AGENT FOR CANCER OF PATIENT WITH DECREASE IN RB1 FUNCTION USING MYT1 INHIBITOR AND CHEMOTHERAPEUTIC AGENT IN COMBINATION, AND TREATMENT METHOD THEREOF WILLIS, DOUGLAS M 9d overdue

Interview Candidates (16)

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
18541602 CROSS-SPECIES ANTI-LATENT TGF-BETA 1 ANTIBODIES AND METHODS OF USE ALLEN, MARIANNE P 163d overdue
18023246 PHARMACEUTICAL COMPOSITION FOR PREVENTION AND/OR TREATMENT OF DIALYSIS PRURITUS CONTAINING IL-31 ANTAGONIST AS ACTIVE INGREDIENT LANDSMAN, ROBERT S 124d overdue
18608369 ARYLAMIDE DERIVATIVE HAVING ANTITUMOR ACTIVITY O DELL, DAVID K 112d overdue
16692676 ANTIGEN-BINDING MOLECULE HAVING REGULATED CONJUGATION BETWEEN HEAVY-CHAIN AND LIGHT-CHAIN BRISTOL, LYNN ANNE 104d overdue
17144342 ANTIGEN-BINDING MOLECULE FOR ELIMINATING AGGREGATED ANTIGENS SANG, HONG 53d overdue
15734755 ANTIGEN-BINDING MOLECULE SHOWING CHANGED HALF-LIFE IN CYTOPLASM CHASE, CAROL ANN 31d overdue
18480730 ANTIGEN-BINDING MOLECULE PROMOTING DISAPPEARANCE OF ANTIGENS HAVING PLURALITY OF BIOLOGICAL ACTIVITIES LANDSMAN, ROBERT S 26d overdue
18567435 FORMULATION CONTAINING DIHYDROPYRIDAZINE-3,5-DIONE DERIVATIVE CHONG, YONG SOO 25d overdue

Top Art Units

Art UnitApps
1643 7
1646 4
1647 3
1674 3
1641 3
1635 2
1675 2
1654 2
1621 1
1627 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18608369 ARYLAMIDE DERIVATIVE HAVING ANTITUMOR ACTIVITY O DELL, DAVID K 1621 Other Final Rejection 112d overdue Pending Mar 18, 2024
18394091 ANTIGEN-BINDING MOLECULE AND COMBINATION RYAN, DOUGLAS CHARLES 1635 §103 Non-Final OA 40d Pending Dec 22, 2023
18541602 CROSS-SPECIES ANTI-LATENT TGF-BETA 1 ANTIBODIES AND METHODS OF USE ALLEN, MARIANNE P 1647 Other Final Rejection 163d overdue Pending Dec 15, 2023
18533622 METHODS AND COMPOSITIONS COMPRISING A BRAF INHIBITOR AND A MEK INHIBITOR NESTOR, DONNA MICHELLE 1627 Other Non-Final OA 4d overdue Pending Dec 08, 2023
18567435 FORMULATION CONTAINING DIHYDROPYRIDAZINE-3,5-DIONE DERIVATIVE CHONG, YONG SOO 1623 §103 Non-Final OA 25d overdue Pending Dec 06, 2023
18480730 ANTIGEN-BINDING MOLECULE PROMOTING DISAPPEARANCE OF ANTIGENS HAVING PLURALITY OF BIOLOGICAL ACTIVITIES LANDSMAN, ROBERT S 1647 Other Non-Final OA 26d overdue Pending Oct 04, 2023
18458292 THERAPEUTIC AGENT FOR CANCER OF PATIENT WITH DECREASE IN RB1 FUNCTION USING MYT1 INHIBITOR AND CHEMOTHERAPEUTIC AGENT IN COMBINATION, AND TREATMENT METHOD THEREOF WILLIS, DOUGLAS M 1624 §103 Non-Final OA 9d overdue Pending Aug 30, 2023
18346975 ANTI-HLA-DQ2.5 ANTIBODY AND ITS USE FOR THE TREATMENT OF CELIAC DISEASE BRISTOL, LYNN ANNE 1643 Other Non-Final OA 15d overdue Pending Jul 05, 2023
18266665 METHOD FOR MEASURING RELATIVE fu RATIO BY DYNAMIC ANALYSIS NGUYEN, NAM P 1678 §103 Non-Final OA 44d overdue Pending Jun 12, 2023
18023246 PHARMACEUTICAL COMPOSITION FOR PREVENTION AND/OR TREATMENT OF DIALYSIS PRURITUS CONTAINING IL-31 ANTAGONIST AS ACTIVE INGREDIENT LANDSMAN, ROBERT S 1647 §103 Non-Final OA 124d overdue Pending Feb 24, 2023
18020656 ONE-ARMED ANTIGEN-BINDING MOLECULES AND USES THEREOF BERHANE, SELAM 1675 §102 Non-Final OA 13d Pending Feb 10, 2023
18010611 SITE SPECIFIC NOTCH-ACTIVATING MOLECULE AND USES THEREOF CHASE, CAROL ANN 1646 §103 Final Rejection 28d Pending Dec 15, 2022
17992032 METHOD FOR SEARCHING AND SCREENING FOR TARGET OF ANTI-CANCER AGENT USING NON-HUMAN ANIMAL MODEL HAVING NOG ESTABLISHED CANCER CELL LINE TRANSPLANTED THEREIN BEHARRY, ZANNA MARIA 1632 §103 Non-Final OA 91d overdue Pending Nov 22, 2022
17926673 IMPROVED GRANZYME B VARIANT PATTERSON, SARAH COOPER 1675 §103 Non-Final OA 11d overdue Pending Nov 21, 2022
17914855 IMMUNE ACTIVATING MULTISPECIFIC ANTIGEN-BINDING MOLECULES AND USES THEREOF DRISCOLL, MAUREEN VARINA 1644 §102 Non-Final OA 105d overdue Pending Sep 27, 2022
17914432 METHOD FOR PRODUCING MULTISPECIFIC ANTIGEN-BINDING MOLECULES BRISTOL, LYNN ANNE 1643 Other Non-Final OA 9d overdue Pending Sep 26, 2022
17913899 CLAUDIN-6 TARGETING MULTISPECIFIC ANTIGEN-BINDING MOLECULES AND USES THEREOF NICKOL, GARY B 1643 Non-Final OA 52d overdue Pending Sep 23, 2022
17897946 TREATMENTS FOR ATOPIC DERMATITIS JIANG, DONG 1674 §103 Non-Final OA 21d Pending Aug 29, 2022
17896758 PREPARATION CONTAINING TETRACYCLIC COMPOUND AT HIGH DOSE FUBARA, BLESSING M 1613 Other Non-Final OA 59d overdue Pending Aug 26, 2022
17797540 METHODS FOR PRODUCING AND/OR ENRICHING RECOMBINANT ANTIGEN-BINDING MOLECULES ROONEY, NORA MAUREEN 1641 §102 Non-Final OA 28d overdue Pending Aug 04, 2022
17788506 METHOD FOR SYNTHESIZING PEPTIDE COMPOUND REYNOLDS, FRED H 1658 §103 Final Rejection 44d overdue Pending Jun 23, 2022
17787809 COMPOSITION FOR TRANSLATION, AND METHOD FOR PRODUCING PEPTIDE GOMEZ RODRIGUEZ, JULIO WASHINGTON 1637 §103 Non-Final OA 87d overdue Pending Jun 21, 2022
17756756 PACKAGE OPENING SYSTEM AYALA, FERNANDO A 3724 §103 Non-Final OA 72d Pending Jun 01, 2022
17773733 CYCLIC PEPTIDE COMPOUND HAVING KRAS INHIBITORY ACTION SABILA, MERCY HELLEN 1654 §112 Non-Final OA 20d Pending May 02, 2022
17312296 AMINO ACID HAVING FUNCTIONAL GROUP CAPABLE OF INTERMOLECULAR HYDROGEN BONDING, PEPTIDE COMPOUND CONTAINING SAME AND METHOD FOR PRODUCTION THEREOF D' AMBROSIO, THEA 1654 Other Final Rejection 24d overdue Pending Apr 29, 2022
17768053 AN ANTIBODY, A PHARMACEUTICAL COMPOSITION, AND A METHOD HOWARD, ZACHARY C 1674 §112 Final Rejection 34d Pending Apr 11, 2022
17716467 ANTIGEN-BINDING MOLECULE FOR PROMOTING CLEARANCE FROM PLASMA OF ANTIGEN COMPRISING SUGAR CHAIN RECEPTOR-BINDING DOMAIN LI, RUIXIANG 1674 §112 Final Rejection 73d overdue Pending Apr 08, 2022
17767742 METHOD FOR SELECTING, ASSESSING, OR PRODUCING SODIUM LAURYL SULFATE AS RAW MATERIAL FOR PHARMACEUTICAL FORMULATION, OR FORMULATION OR THE LIKE CONTAINING SAME WEDDINGTON, KEVIN E 1629 §103 Non-Final OA 14d Pending Apr 08, 2022
17766280 INHIBITOR OF CELL PROLIFERATION IN OBINUTUZUMAB RESISTANT CD20-POSITIVE CANCER, AND MEDICINAL COMPOSITION, MEDICINE, PRODUCTION, METHOD FOR INHIBITING CELL PROLIFERATION, THERAPEUTIC METHOD, TYPE II ANTI-CD20 ANTIBODY, COMPOUNDS, COMBINATION OF SAME, ENHANCER AND INDUCER, EACH RELATING THERETO SANG, HONG 1646 §102 Non-Final OA 29d Pending Apr 04, 2022
17621746 ANTIGEN BINDING MOLECULES THAT BIND PDGF-B AND PDGF-D AND USES THEREOF HOPKINS, SAMANTHA LAKE 1641 §103 Non-Final OA 62d Pending Dec 22, 2021
17616421 INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, PROGRAM, AND METHOD FOR PRODUCING ANTIGEN-BINDING MOLECULE OR PROTEIN PLAYER, ROBERT AUSTIN 1686 §103 Non-Final OA 27d Pending Dec 03, 2021
17438993 ANTIGEN-BINDING MOLECULE CONTAINING ANTIGEN-BINDING DOMAIN OF WHICH BINDING ACTIVITY TO ANTIGEN IS CHANGED DEPENDING ON MTA, AND LIBRARY FOR OBTAINING SAID ANTIGEN-BINDING DOMAIN SKOKO III, JOHN JOSEPH 1643 §112 Non-Final OA 114d overdue Pending Sep 14, 2021
17438496 ANTI-HLA-DQ2.5 ANTIBODY DIBRINO, MARIANNE 1641 Other Non-Final OA 119d overdue Pending Sep 13, 2021
17417822 MUTATED tRNA FOR CODON EXPANSION RYAN, DOUGLAS CHARLES 1635 §103 Non-Final OA 3d overdue Pending Jun 24, 2021
17290439 HER2 S310F SPECIFIC ANTIGEN-BINDING MOLECULES FAUST, AMBER KATHLEEN 1643 §112 Final Rejection 29d overdue Pending Apr 30, 2021
17262105 TARGET CELL SPECIFIC CYTOSOL-PENETRATING ANTIGEN-BINDING MOLECULES STONEBRAKER, ALYSSA RAE 1642 Other Final Rejection 17d overdue Pending Jan 21, 2021
17144342 ANTIGEN-BINDING MOLECULE FOR ELIMINATING AGGREGATED ANTIGENS SANG, HONG 1646 §112 Non-Final OA 53d overdue Pending Jan 08, 2021
15734755 ANTIGEN-BINDING MOLECULE SHOWING CHANGED HALF-LIFE IN CYTOPLASM CHASE, CAROL ANN 1646 §103 Final Rejection 31d overdue Pending Dec 03, 2020
17058896 LIGAND-BINDING MOLECULE CONTAINING SINGLE DOMAIN ANTIBODY EDGINGTONGIORDANO, FRANCESCA 1643 Other Non-Final OA 38d overdue Pending Nov 25, 2020
16692676 ANTIGEN-BINDING MOLECULE HAVING REGULATED CONJUGATION BETWEEN HEAVY-CHAIN AND LIGHT-CHAIN BRISTOL, LYNN ANNE 1643 Other Final Rejection 104d overdue Pending Nov 22, 2019

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