Granted Patent
Utility
US 5,807,944 · App. 08/671,278
Amphiphilic, segmented copolymer of controlled morphology and ophthalmic devices including contact lenses made therefrom
Inventors:
Thomas Hirt, Dieter Lohmann, Jens Hopken, Qin Liu
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Jun 27, 1996
Inventors
Thomas Hirt
Dieter Lohmann
Jens Hopken
Qin Liu
Assignee (at issue)
CIBA Vision 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.