Granted Patent
Utility
US 4,277,582 · App. 06/051,337
Water-insoluble hydrophilic copolymers
Inventors:
Karl F. Mueller, William R. Good
Patented Case
View Patent ↗
Granted: Jul 7, 1981
Filed: Jun 22, 1979
Inventors
Karl F. Mueller
William R. Good
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.