Granted Patent
Utility
US 4,880,892 · App. 07/234,779
Composition comprising an epoxy resin, a phenol and an advancement catalyst
Inventors:
Wataru Urano, Yasuaki Sugano
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Aug 22, 1988
Inventors
Wataru Urano
Yasuaki Sugano
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.