Granted Patent
Utility
US 4,891,408 · App. 07/084,883
Epoxy resins based on tetraglycidyl diamines
Inventor:
Richard H. Newman-Evans
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Aug 13, 1987
Inventor
Richard H. Newman-Evans
Assignee (at issue)
Amoco Corporation
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.