Granted Patent
Utility
US 4,797,455 · App. 07/082,168
Isocyanates blocked with 1-amino-alkyl imidazoles as epoxy curing agents
Inventors:
Shiow-Ching Lin, Ping-Lin Kuo
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Aug 6, 1987
Inventors
Shiow-Ching Lin
Ping-Lin Kuo
Assignee (at issue)
W.R. Grace & Co. Conn.
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.