Granted Patent
Utility
US 6,174,983 · App. 09/190,534
Silicone terpolymers with high refractive indices
Inventors:
Anna Czech, Jeffrey A. Cooke
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Nov 12, 1998
Inventors
Anna Czech
Jeffrey A. Cooke
Assignee (at issue)
CK WITCO 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.