Granted Patent
Utility
US 4,384,974 · App. 06/061,359
Stable water-in-oil emulsions
Inventor:
Bernadette Guthauser
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Jul 27, 1979
Inventor
Bernadette Guthauser
Assignee (at issue)
Revlon
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.