Granted Patent
Utility
US 4,883,684 · App. 07/213,959
Functional hardstock fat composition
Inventor:
David K. Yang
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Jul 1, 1988
Inventor
David K. Yang
Assignee (at issue)
The Procter & Gamble 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.