Granted Patent
Utility
US 5,081,217 · App. 07/523,499
Aromatic compounds containing cyanate ester and propargyl ether groups
Inventor:
Roy J. Jackson
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: May 15, 1990
Inventor
Roy J. Jackson
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.