Granted Patent
Utility
US 4,430,458 · App. 06/309,688
Hydrogel-forming polymeric materials
Inventors:
Brian J. Tighe, Howard J. Gee
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Oct 8, 1981
Inventors
Brian J. Tighe
Howard J. Gee
Assignee (at issue)
Kelvin Lenses Limited
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.