Granted Patent
Utility
US 3,985,697 · App. 05/471,575
Hydrophilic contact lens material
Inventor:
Jacques Urbach
Patented Case
View Patent ↗
Granted: Oct 12, 1976
Filed: May 20, 1974
Inventor
Jacques Urbach
Assignee (at issue)
Uroptics International Incorporated
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.