Granted Patent
Utility
US 4,970,332 · App. 07/321,273
Process for producing 2-ethylhexyl-p-methoxycinnamate
Inventor:
Douglas C. Caskey
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Mar 9, 1989
Inventor
Douglas C. Caskey
Assignee (at issue)
MALLINCKRODT LLC
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.