Prosecution Insights
Last updated: October 25, 2026

Amgen Inc.

Technology areas: Biotechnology & Pharmaceuticals • Medical Devices & Mechanical Engineering

129 pending office actions • 50 art units • 111 examiners • 0 of 129 (0%) have an AI response strategy ready • 118 patents granted in the last 365 days

Analysis

Amgen Inc. has 130 pending office actions in Biotechnology & Pharmaceuticals. The portfolio reaches 108 distinct examiners across 49 distinct art units. This is a large and widely distributed prosecution workload, with extensive examiner coverage and repeated presence in multiple technical examination groups.

SKELDING, ZACHARY S is the busiest examiner, with 4 pending matters. The largest identified examiner grouping is limited compared with the overall portfolio, so examiner-specific tactics will apply to only a portion of the work. Counsel should combine centralized biotechnology claim strategy with detailed matter-level preparation across the art units.

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

Portfolio Summary

129
Total Pending OAs
81
Non-Final OAs
46
Final Rejections
2
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 33 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

18
Overdue
2
Due this week
8
Due this month
2
Due in next 60 days
3
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. 33 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (18)Due ≤ 7 days (2)Due ≤ 30 days (8)Due ≤ 60 days (2)Due later (3)

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.

51
Hard (40%)
58
Medium (45%)
16
Easy (12%)
4
Unknown (3%)

Rejection Statute Mix

BucketCases
§101 only1 (1%)
§101 + other10 (8%)
§103 only29 (22%)
§102 only5 (4%)
§112 only12 (9%)
Double-patenting only4 (3%)
Double-patenting + other24 (19%)
Multi-statute (no §101)40 (31%)
No statute on record4 (3%)

Industry Mix

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

92
Life Sciences
71% of docket
4
Information Tech
3% of docket
1
Communications
1% of docket
2
Semiconductors
2% of docket
29
Mechanical / Eng
22% of docket
1
Business / Other
1% 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.

1,290 h
Manual time on pending OAs
258 h
Time saved (low, 20%)
451 h
Time saved (mid, 35%)
11.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
SKELDING, ZACHARY S 4 59.8% +41.1%
BRISTOL, LYNN ANNE 3 63.4% +39.8%
DUFFY, BRADLEY 3 54.4% +46.0%
TECCO, ANDREW M 2 65.5% +24.6%
BOUCHELLE, LAURA A 2 80.2% +10.3%
PATEL, SHEFALI DILIP 2 58.1% +27.7%
HALL, DEANNA K 2 75.7% +15.3%
SZPERKA, MICHAEL EDWARD 2 62.6% +37.5%
XU, XIAOYUN 2 59.9% +31.6%
KAUFMAN, CLAIRE M 2 63.3% +51.0%

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
17846310 SYRINGES, ASSEMBLIES, AND METHODS OF MANUFACTURE BOUCHELLE, LAURA A —

Hard Cases (51)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
18018389 CELL CULTURE MEDIA AND METHODS OF MAKING AND USING THE SAME VAN BUREN, LAUREN K 153d overdue
17775386 Method for Reduced Aggregate Formation in Downstream Processing of Bispecific Antigen-Binding Molecules SKELDING, ZACHARY S 52d overdue
18270581 USE OF KRAS G12C INHIBITOR IN TREATING CANCERS HASTINGS, ALISON AZAR 23d overdue
17436218 IN VIVO REVERSIBILITY OF HIGH MOLECULAR WEIGHT SPECIES FRITCHMAN, REBECCA M 8d
18266689 DIFFUSION GRADIENT ASSAY FOR ANTI-CD3-CONTAINING MOLECULES SPENCE, JENNIFER SUZANNE 12d
18038579 ENANTIOSELECTIVE ALKENYLATION OF ALDEHYDES MOORE, SUSANNA 16d
17036690 DRUG DELIVERY DEVICE LALONDE, ALEXANDRA ELIZABETH 22d
18026678 METHODS OF PROCESSING A SAMPLE FOR PEPTIDE MAPPING ANALYSIS ARMATO JR, DENNIS IGNATIUS 33d

Interview Candidates (24)

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
18042267 ANTIGEN BINDING PROTEINS WITH NON-CANONICAL DISULFIDE IN FAB REGION BRISTOL, LYNN ANNE 93d overdue
16586318 CROSS-SPECIES-SPECIFIC BISPECIFIC BINDERS SKELDING, ZACHARY S 77d overdue
17775386 Method for Reduced Aggregate Formation in Downstream Processing of Bispecific Antigen-Binding Molecules SKELDING, ZACHARY S 52d overdue
17775063 ENGINEERING CHARGE PAIR MUTATIONS FOR PAIRING OF HETERO-IgG MOLECULES DUFFY, BRADLEY 45d overdue
17921793 PHARMACEUTICAL FORMULATION KAUFMAN, CLAIRE M 17d overdue
18245004 METHODS OF DETECTING ISOASPARTIC ACID XU, XIAOYUN 28d
18962768 AUTOMATED SYSTEMS AND METHODS FOR FOIL PACKAGING COMPONENTS TECCO, ANDREW M —
18845286 PACKAGING FOR DRUG DELIVERY DEVICE TECCO, ANDREW M —

Top Art Units

Art UnitApps
3783 24
1643 8
1641 8
1674 7
1644 6
1675 4
1642 4
1622 3
3731 3
1651 3

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19281019 SYNTHESIS OF KEY INTERMEDIATE OF KRAS G12C INHIBITOR COMPOUND SIMMONS, CHRIS E 1622 §112Other Non-Final OA 75d Pending Jul 25, 2025
19045308 ROBOTIC SYSTEM FOR PERFORMING PATTERN RECOGNITION-BASED INSPECTION OF PHARMACEUTICAL CONTAINERS RODRIGUEZ, JOSEPH C 3653 §103Other Non-Final OA — Pending Feb 04, 2025
18878828 ANTI-PD-1 ANTIBODY FORMULATIONS OGUNBIYI, OLUWATOSIN A 1645 §103§112 Non-Final OA — Pending Dec 24, 2024
18967331 METHODS OF TREATING HEART FAILURE BY ADMINISTERING OMECAMTIV MECARBIL COHEN, MICHAEL P — §112 Non-Final OA — Pending Dec 03, 2024
18962768 AUTOMATED SYSTEMS AND METHODS FOR FOIL PACKAGING COMPONENTS TECCO, ANDREW M 3731 §102§103 Non-Final OA — Pending Nov 27, 2024
18939822 PROCESSES OF MAKING AND CRYSTALLINE FORMS OF A MDM2 INHIBITOR O DELL, DAVID K 1621 DP Non-Final OA — Pending Nov 07, 2024
18855457 COMPLEMENT-DEPENDENT CYTOTOXICITY METHODS CURRENS, GRANT CARSON 1651 §103 Non-Final OA — Pending Oct 09, 2024
18853977 SYSTEMS AND METHODS FOR REDUCING EXCESS RESOURCE USAGE KESSLER, GREGORY AARON 2197 §101§102 Non-Final OA — Pending Oct 03, 2024
18853736 Cancer Treatments Using MTA-Cooperative PRMT5 Inhibitors MCKOY, QUINCY ANDRE 1626 §103§112DP Non-Final OA — Pending Oct 03, 2024
18845273 OPTIMIZED TRANSFECTION PROTOCOL CORDAS, EMILY ANN 1632 §103 Non-Final OA — Pending Sep 09, 2024
18845286 PACKAGING FOR DRUG DELIVERY DEVICE TECCO, ANDREW M 3731 §102§103§112 Non-Final OA — Pending Sep 09, 2024
18842194 A PROCESS FOR PREPARING 4-METHYL-2-PROPAN-2-YL-PYRIDINE-3-CARBONITRILE RAHMANI, NILOOFAR 1691 Other Final Rejection — Pending Aug 28, 2024
18807705 MACHINE LEARNING (ML)-BASED SYSTEMS AND METHODS FOR PREDICTING DISEASE EVANS, ASHLEY ELIZABETH 3687 §101§103 Non-Final OA 39d Pending Aug 16, 2024
18798878 AFLIBERCEPT ATTRIBUTES AND METHODS OF CHARACTERIZING AND MODIFYING THEREOF BORGEEST, CHRISTINA M 1675 §101§102§103§112 Non-Final OA — Pending Aug 09, 2024
18789085 DRUG DELIVERY DEVICE BOUCHELLE, LAURA A 3783 §102§103Other Non-Final OA — Pending Jul 30, 2024
18832887 SYNTHESIS OF A KIF18A INHIBITOR OH, TAYLOR V 1625 §102§112 Non-Final OA — Pending Jul 24, 2024
18730353 Crystalline Salt and Solvate Forms Of Murizatoclax (AMG 397) DAHLIN, HEATHER RAQUEL 1629 §103§112DP Non-Final OA — Pending Jul 19, 2024
18730357 Crystalline Forms Of An MCL-1 Inhibitor SAMSELL, RILLA MARIE 1624 §102§103§112 Non-Final OA — Pending Jul 19, 2024
18744036 AUTOINJECTOR WITH SHOCK REDUCING ELEMENTS MEDWAY, SCOTT J 3783 §102§103 Non-Final OA — Pending Jun 14, 2024
18719164 METHODS FOR DESIGNING AND PERFORMING A VAPOR PHASE HYDROGEN PEROXIDE DECONTAMINATION CYCLE HOERNER, PAUL ELLSWORTH 1611 §112 Final Rejection — Pending Jun 12, 2024
18674549 INJECTION DEVICE FOR DRUG DELIVERY AND PACKAGING FOR THE INJECTION DEVICE PATEL, SHEFALI DILIP 3783 §102§103 Final Rejection — Pending May 24, 2024
18712768 STOPPER PLACEMENT IN A SYRINGE SEIF, DARIUSH 3731 §102§103§112 Non-Final OA — Pending May 23, 2024
18710112 PLUNGER ROD REMOVAL FORCE METHOD AND FIXTURE PATEL, SHEFALI DILIP 3783 §102§103§112 Non-Final OA — Pending May 14, 2024
18645779 CONTROLLABLE DRUG DELIVERY SYSTEM AND METHOD OF USE HALL, DEANNA K 3783 §102§103 Non-Final OA — Pending Apr 25, 2024
18701723 COMPOSITION AND METHODS FOR RECOMBINANT LENTIVIRAL PRODUCTION PRONZATI, GINA 1633 §103§112 Non-Final OA — Pending Apr 16, 2024
18698098 FC-GAMMA RECEPTOR II BINDING AND GLYCAN CONTENT EVANS, CHRISTOPHER RYAN 1677 §102§103§112 Non-Final OA — Pending Apr 03, 2024
18697770 CHARACTERIZATION APPARATUS FOR DRUG DELIVERY DEVICES OR SUBCOMPONENTS THEREOF NATH, SUMAN KUMAR 2855 §101 Non-Final OA — Pending Apr 02, 2024
18696946 Heterocyclic Compounds and Methods of Use CHAO, ALLEN 1622 §103DP Non-Final OA — Pending Mar 28, 2024
18611364 ST2 ANTIGEN BINDING PROTEINS MCCOLLUM, ANDREA K 1674 §101§112Other Non-Final OA — Pending Mar 20, 2024
18685037 MYOPEPTIDES AND METHODS OF USE IN TREATING HEART FAILURE CHERNYSHEV, OLGA N 1675 §112 Non-Final OA — Pending Feb 20, 2024
18684262 METHODS COMPRISING THERAPEUTIC COMPOUNDS AND IN VITRO MAMMALIAN SKIN CLARKE, TRENT R 1651 §101§103§112 Non-Final OA — Pending Feb 16, 2024
18435746 TIGIT AND CD112R BLOCKADE GAO, ASHLEY HARTMAN 1678 §112 Non-Final OA — Pending Feb 07, 2024
18681252 ISOLATION OF THERAPEUTIC PROTEIN HOLLAND, PAUL J 1656 §103 Final Rejection — Pending Feb 05, 2024
18291294 STEREOSELECTIVE PREPARATION OF TRANS HALO CYCLOBUTANE BAKSHI, PANCHAM 1623 §112 Final Rejection — Pending Jan 23, 2024
18571614 Treatment of Cardiovascular Disease with TREM-1 Antigen Binding Proteins PRIEST, JESSICA MARIE 1642 §112DP Non-Final OA — Pending Dec 18, 2023
18538279 ANTIBODY CONSTRUCTS FOR MSLN AND CD3 BRISTOL, LYNN ANNE 1643 §112DP Non-Final OA — Pending Dec 13, 2023
18535068 FORMULATIONS OF HUMAN ANTI-RANKL ANTIBODIES, AND METHODS OF USING THE SAME LANDSMAN, ROBERT S 1647 Other Final Rejection 21d Pending Dec 11, 2023
18525039 METHODS OF ANTIBODY PRODUCTION NGUYEN, JOHN P 1619 §103 Final Rejection 70d Pending Nov 30, 2023
18564805 DRUG DELIVERY DEVICES, FINGER-GRIP ELEMENTS, AND RELATED METHODS DOUBRAVA, JOHN A 3783 §102 Final Rejection — Pending Nov 28, 2023
18561341 FEEDBACK SYSTEM AND METHOD FOR A DRUG PRODUCT CASILLASHERNANDEZ, OMAR 2689 §103 Final Rejection — Pending Nov 16, 2023
18289317 DOSING REGIMEN FOR COMBINATION THERAPY TARGETING DLL3 AND PD-1 DUTT, ADITI 1675 DP Non-Final OA — Pending Nov 02, 2023
18288410 ETELCALCETIDE FORMULATIONS LEE, JIA-HAI 1658 §103§112DP Non-Final OA — Pending Oct 26, 2023
18287593 ANTI-TSLP ANTIBODY COMPOSITIONS AND USES THEREOF MIDDLETON, DANAYA L 1674 §103§112DP Non-Final OA — Pending Oct 19, 2023
18381745 DUAL RECEPTOR ANTAGONISTIC ANTIGEN-BINDING PROTEINS AND USES THEREOF LI, RUIXIANG 1674 Other Non-Final OA — Pending Oct 19, 2023
18286702 Automated Outlier Removal for Multivariate Modeling BECK, LERON 2487 §103 Final Rejection — Pending Oct 12, 2023
18286242 SYSTEMS AND METHODS TO EVALUATE INACTIVATION KINETICS OF A BIOLOGICAL INDICATOR NEGIN, RUSSELL SCOTT 1686 §101§103 Non-Final OA — Pending Oct 10, 2023
18285125 MAGEB2 BINDING CONSTRUCTS JOHANSEN, PETER N. 1644 §112 Non-Final OA — Pending Sep 29, 2023
18284590 MODULATING PRODUCT QUALITY OF ASYMMETRIC MULTISPECIFIC ANTIBODIES THROUGH THE USE OF TEMPERATURE AEDER, SEAN E 1642 §103§112 Non-Final OA — Pending Sep 28, 2023
18550650 SOUND-DETECTION BASED INJECTION TIME MEASUREMENT SYSTEM FOR DRUG DELIVERY DEVICES FREHE, WILLIAM R 3783 §102§103 Non-Final OA — Pending Sep 14, 2023
18550645 COMPONENT MATCHING DECISION SUPPORT TOOL CARTER, CHRISTOPHER W 2117 §102 Final Rejection — Pending Sep 14, 2023

View all 129 →

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Frequently Asked Questions

How many pending USPTO office actions does Amgen Inc. have?

Amgen Inc. has 129 pending office actions as of October 2026, spread across 50 art units and 111 examiners.

Which USPTO examiner handles the most Amgen Inc. applications?

Zachary S Skelding has the most, with 4 of Amgen Inc.'s pending office actions.

What technology area are Amgen Inc.'s patent applications in?

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

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