Granted Patent
Utility
US 4,582,640 · App. 06/663,478
Injectable cross-linked collagen implant material
Inventors:
Thomas L. Smestad, John M. McPherson, Donald G. Wallace
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Oct 22, 1984
Inventors
Thomas L. Smestad
John M. McPherson
Donald G. Wallace
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.