Granted Patent
Utility
US 4,386,039 · App. 06/238,767
Process for forming an optically clear polyurethane lens or cornea
Inventor:
Michael Szycher
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Feb 27, 1981
Inventor
Michael Szycher
Assignee (at issue)
Thermo Electron GmbH
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.