Granted Patent
Utility
US 4,983,709 · App. 07/279,383
Aromatic compounds containing cyanate ester and propargyl ether groups
Inventor:
Roy J. Jackson
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Dec 2, 1988
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.