Granted Patent
Utility
US 5,387,656 · App. 08/153,401
Substituted cyanoguanidines as curing agents for epoxy resins
Inventors:
Joseph J. Zupancic, Jeffrey P. Conrad
Patented Case
View Patent ↗
Granted: Feb 7, 1995
Filed: Nov 16, 1993
Inventors
Joseph J. Zupancic
Jeffrey P. Conrad
Assignee (at issue)
AlliedSignal, Inc.
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.