Granted Patent
Utility
US 4,940,577 · App. 07/185,860
Ester based water-in-oil cosmetic microemulsions
Inventors:
Stephen Greenberg, Louis A. Frischling
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Apr 25, 1988
Inventors
Stephen Greenberg
Louis A. Frischling
Assignee (at issue)
LIPO CHEMICALS 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.