Granted Patent
Utility
US 5,206,306 · App. 07/845,207
Process for making a polymer for an optical substrate by hydrogenating a cycloolefin copolymer
Inventor:
Dennis Shen
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Mar 3, 1992
Inventor
Dennis Shen
Assignee (at issue)
B. F. Goodrich Company
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.