Granted Patent
Utility
US 4,962,178 · App. 07/266,555
Novel polysiloxane-polyurethanes and contact lens thereof
Inventor:
Paul Harisiades
Patented Case
View Patent ↗
Granted: Oct 9, 1990
Filed: Nov 3, 1988
Inventor
Paul Harisiades
Assignee (at issue)
Ciba-Geigy
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.