Granted Patent
Utility
US 4,783,372 · App. 07/041,889
Homopolymers, copolymers and coated material and its use
Inventor:
Josef Pfeifer
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: Apr 22, 1987
Inventor
Josef Pfeifer
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.