Granted Patent
Utility
US 4,409,258 · App. 06/260,674
Treatment process for rendering corneal contact lenses hydrophilic
Inventors:
Bernard Feurer, Philippe Baronet
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: May 5, 1981
Inventors
Bernard Feurer
Philippe Baronet
Assignee (at issue)
Alcon Pharmaceuticals, Ltd.
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.