Granted Patent
Utility
US 4,557,764 · App. 06/648,001
Process for preparing malleable collagen and the product thereof
Inventor:
George H. Chu
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Sep 5, 1984
Inventor
George H. Chu
Assignee (at issue)
COLLAGEN CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.