Granted Patent
Utility
US 4,534,916 · App. 06/597,334
Method for the preparation of hydrophilic gels by monomer casting
Inventor:
Otto Wichterle
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Apr 6, 1984
Inventor
Otto Wichterle
Assignee (at issue)
Ceskoslovenska
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.