Granted Patent
Utility
US 4,866,133 · App. 07/095,725
Solid solutions of polymeric phenols and polyamines as epoxy curing agents
Inventors:
Christopher M. Andrews, Madan M. Bagga
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Sep 14, 1987
Inventors
Christopher M. Andrews
Madan M. Bagga
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.