Granted Patent
Utility
US 4,867,800 · App. 07/222,496
Cleaning composition of terpene compound and dibasic ester
Inventors:
Kenneth T. Dishart, Mark C. Wolff
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jul 21, 1988
Inventors
Kenneth T. Dishart
Mark C. Wolff
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.