Granted Patent
Utility
US 4,847,233 · App. 07/228,469
Metal acetylacetonate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
Inventor:
David A. Shimp
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Aug 5, 1988
Inventor
David A. Shimp
Assignee (at issue)
Hi-Tek Polymers, Inc.
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.