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USPTO Patent Grant: Modified Plasma Clotting Factor VIII

Favicon for changeflow.com USPTO Patent Grants - Peptides (C07K)
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Summary

The USPTO has granted patent US12583907B2 to AAVnerGene, INC. for modified human factor VIII polypeptides with enhanced activity. These polypeptides and their encoding viral vectors are intended for treating FVIII deficiencies, such as hemophilia A.

Published by USPTO on changeflow.com . Detected, standardized, and enriched by GovPing. Review our methodology and editorial standards .

What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12583907B2, titled 'Modified plasma clotting factor VIII and method of use thereof,' to AAVnerGene, INC. The patent covers modified human factor VIII polypeptides that exhibit enhanced factor VIII activity, specifically detailing amino acid substitutions at various positions. It also includes viral vectors encoding these polypeptides and their application in treating FVIII deficiencies, such as hemophilia A.

This patent grant is primarily relevant to pharmaceutical and biotechnology companies involved in the research, development, and commercialization of gene therapies or protein-based treatments for hemophilia A. While it does not impose direct compliance obligations on other entities, it signifies intellectual property protection for specific therapeutic innovations in this area. Companies operating in this space should be aware of this patent and its claims to ensure freedom to operate and to inform their own R&D strategies.

Archived snapshot

Mar 24, 2026

GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.

← USPTO Patent Grants

Modified plasma clotting factor VIII and method of use thereof

Grant US12583907B2 Kind: B2 Mar 24, 2026

Assignee

AAVnerGene, INC.

Inventors

Qizhao Wang, Daozhan Yu

Abstract

Modified human factor VIII polypeptides with enhanced factor VIII activity are described. In some embodiments, the modified human factor VIII polypeptides comprise one or more amino acid substitutions at positions A20, T21, F57, L69, I80, L178, R199, H212, I215, R269, I310, L318, S332, R378, I610 and/or I661. Such polypeptides and viral vectors encoding such polypeptides may be used for treatment of FVIII deficiencies, such as hemophilia A.

CPC Classifications

C07K 14/755 C12N 15/86 A61K 38/00

Filing Date

2023-09-15

Application No.

18468535

Claims

17

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Named provisions

Abstract Claims

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Last updated

Classification

Agency
USPTO
Published
March 24th, 2026
Instrument
Notice
Legal weight
Non-binding
Stage
Final
Change scope
Minor
Document ID
US12583907B2

Who this affects

Applies to
Drug manufacturers Pharmaceutical companies
Industry sector
3254 Pharmaceutical Manufacturing 3345 Medical Device Manufacturing
Activity scope
Gene Therapy Development Drug Development
Geographic scope
United States US

Taxonomy

Primary area
Pharmaceuticals
Operational domain
Research & Development
Topics
Biotechnology Medical Devices

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