Granted Patent
Utility
US 4,933,421 · App. 07/330,517
Epoxy resin composition containing metal tetrafluoroborate and boron ester
Inventor:
Glen Morehead
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Mar 30, 1989
Inventor
Glen Morehead
Assignee (at issue)
SHELL OIL COMPANY
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.