Granted Patent
Utility
US 4,634,449 · App. 06/778,576
Opaque tinting process for contact lens
Inventor:
Evan J. Jenkins
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Sep 20, 1985
Inventor
Evan J. Jenkins
Assignee (at issue)
International Hydron Corporation
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.