Granted Patent
Utility
US 4,859,780 · App. 07/160,623
Hydrophilic modifier monomers
Inventors:
Frank Molock, J. Richard Robertson, Kai C. Su
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Feb 26, 1988
Inventors
Frank Molock
J. Richard Robertson
Kai C. Su
Assignee (at issue)
Ciba-Geigy
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.