Granted Patent
Utility
US 4,954,580 · App. 07/273,525
Epoxysiloxanes
Inventor:
Sheik A. Zahir
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Nov 21, 1988
Inventor
Sheik A. Zahir
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.