Granted Patent
Utility
US 5,070,169 · App. 07/342,848
Wettable, flexible, oxygen permeable contact lens containing block copolymer polysiloxane-polyoxyalkylene backbone units and use thereof
Inventors:
J. Richard Robertson, Kai C. Su, Merrill Goldenberg, Karl F. Mueller
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Apr 24, 1989
Inventors
J. Richard Robertson
Kai C. Su
Merrill Goldenberg
Karl F. Mueller
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.