Granted Patent
Utility
US 4,701,513 · App. 06/941,864
Novel epoxy hardeners
Inventor:
Shiow-Ching Lin
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Dec 15, 1986
Inventor
Shiow-Ching Lin
Assignee (at issue)
W. R. Grace & Co.
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.