Granted Patent
Utility
US 5,807,927 · App. 08/875,339
Crosslinked polymers containing urethane groups
Inventors:
Friedrich Stockinger, Beat Muller
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Sep 12, 1997
Inventors
Friedrich Stockinger
Beat Muller
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.