Innovation & intellectual property · 21/06/2006Updated: 10/17/2026 · 1 min read
U.S. Patent Office Grants Interim Extension to PolyHeme Patent
Summary
The U.S. Patent and Trademark Office has granted a fourth one-year extension to the term of U.S. Patent No. 4,826,811, which covers the PolyHeme cellular red blood cell substitute
Original source language: Federal Register — Patent and Trademark OfficeOpen original release →