Granted Patent
Utility
US 5,057,560 · App. 07/526,191
Thermotropic copolymer hydrogels from N,N-dimethylacrylamide and methoxy-ethyl (meth) acrylate
Inventor:
Karl F. Mueller
Patented Case
View Patent ↗
Granted: Oct 15, 1991
Filed: May 21, 1990
Inventor
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.