Granted Patent
Utility
US 4,973,648 · App. 07/411,949
Epoxy resin compositions
Inventors:
Arnold Hofer, Hans Gempeler
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Sep 25, 1989
Inventors
Arnold Hofer
Hans Gempeler
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.