Prosecution Insights
Last updated: October 25, 2026

Bioverativ Usa Inc.

Technology area: Biotechnology & Pharmaceuticals

4 pending office actions • 4 art units • 4 examiners • 0 of 4 (0%) have an AI response strategy ready • 1 patents granted in the last 365 days

Analysis

Bioverativ Usa Inc. has 4 pending office actions in Biotechnology & Pharmaceuticals. Those matters involve 4 distinct examiners and 4 distinct art units, indicating that the pending work is distributed across both examining personnel and technical groups.

XIAO, YAN is the busiest examiner, with 1 pending matter. Counsel should review that matter separately because the available data does not indicate examiner concentration beyond that single assignment.

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

Portfolio Summary

4
Total Pending OAs
2
Non-Final OAs
2
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 2 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
0
Due in next 60 days
0
Due later

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 (75%)
0
Medium (0%)
0
Easy (0%)
1
Unknown (25%)

Rejection Statute Mix

BucketCases
§101 + other1 (25%)
Multi-statute (no §101)2 (50%)
No statute on record1 (25%)

Industry Mix

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

4
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.

40 h
Manual time on pending OAs
8 h
Time saved (low, 20%)
14 h
Time saved (mid, 35%)
0.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
XIAO, YAN 1 67.3% +52.7%
KIM, YUNSOO 1 66.0% +34.0%
WEIDNER, ADAM M 1 63.7% +33.6%
HOWARD, ZACHARY C 1 63.9% +37.7%

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
18164521 INFLAMMATORY CYTOKINES AND FATIGUE IN SUBJECT WITH A COMPLEMENT MEDIATED DISEASE WEIDNER, ADAM M 26d overdue
18477981 REDUCING SURGERY-ASSOCIATED HEMOLYSIS IN COLD AGGLUTININ DISEASE PATIENTS XIAO, YAN —
18334567 ANTI-COMPLEMENT C1S ANTIBODY FORMULATION KIM, YUNSOO —

Interview Candidates (4)

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 4 ordered by deadline are shown.

App #TitleExaminerDue in
17818885 HUMANIZED ANTI-C1S ANTIBODIES AND METHODS OF USE THEREOF HOWARD, ZACHARY C 36d overdue
18164521 INFLAMMATORY CYTOKINES AND FATIGUE IN SUBJECT WITH A COMPLEMENT MEDIATED DISEASE WEIDNER, ADAM M 26d overdue
18477981 REDUCING SURGERY-ASSOCIATED HEMOLYSIS IN COLD AGGLUTININ DISEASE PATIENTS XIAO, YAN —
18334567 ANTI-COMPLEMENT C1S ANTIBODY FORMULATION KIM, YUNSOO —

Top Art Units

Art UnitApps
1642 1
1644 1
1675 1
1674 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18477981 REDUCING SURGERY-ASSOCIATED HEMOLYSIS IN COLD AGGLUTININ DISEASE PATIENTS XIAO, YAN 1642 §102§103 Non-Final OA — Pending Sep 29, 2023
18334567 ANTI-COMPLEMENT C1S ANTIBODY FORMULATION KIM, YUNSOO 1644 §103§112 Non-Final OA — Pending Jun 14, 2023
18164521 INFLAMMATORY CYTOKINES AND FATIGUE IN SUBJECT WITH A COMPLEMENT MEDIATED DISEASE WEIDNER, ADAM M 1675 §101§103Other Final Rejection 26d overdue Pending Feb 03, 2023
17818885 HUMANIZED ANTI-C1S ANTIBODIES AND METHODS OF USE THEREOF HOWARD, ZACHARY C 1674 Other Final Rejection 36d overdue Pending Aug 10, 2022

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Frequently Asked Questions

How many pending USPTO office actions does Bioverativ Usa Inc. have?

Bioverativ Usa Inc. has 4 pending office actions as of October 2026, spread across 4 art units and 4 examiners.

Which USPTO examiner handles the most Bioverativ Usa Inc. applications?

Yan Xiao has the most, with 1 of Bioverativ Usa Inc.'s pending office actions.

What technology area are Bioverativ Usa 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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