Granted Patent
Utility
US 5,039,458 · App. 07/432,833
Method of making a hydrophilic, biocompatible, protein non-adsorptive contact lens
Inventors:
James A. Braatz, Clifton L. Kehr
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Nov 7, 1989
Inventors
James A. Braatz
Clifton L. Kehr
Assignee (at issue)
W.R. Grace & Co. Conn.
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.