Granted Patent
Utility
US 5,160,463 · App. 07/732,129
Method of manufacturing a contact lens
Inventors:
John M. Evans, Ashok R. Thakrar
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Jul 18, 1991
Inventors
John M. Evans
Ashok R. Thakrar
Assignee (at issue)
Pilkington Visioncare Inc.
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.