Granted Patent
Utility
US 6,191,216 · App. 09/180,288
Hydrophilic, self-adhesive polyurethane gel substances
Inventors:
Otto Ganster, Jörg Büchner, Jochen Kenndoff, Gunther Sachau
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Nov 3, 1998
Inventors
Otto Ganster
Jörg Büchner
Jochen Kenndoff
Gunther Sachau
Assignee (at issue)
Bayer A.G.
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.