Granted Patent
Utility
US 5,765,574 · App. 08/714,200
Sampler device for mascara and other cosmetic substances
Inventors:
Robert J. Sheffler, Charles Chang
Patented Case
View Patent ↗
Granted: Jun 16, 1998
Filed: Sep 16, 1996
Inventors
Robert J. Sheffler
Charles Chang
Assignee (at issue)
Charles Chang
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.