Granted Patent
Utility
US 4,938,952 · App. 07/258,219
Polymer supported cosmetic products and methods
Inventors:
Melvin E. Kamen, Philip A. Bernstein, Amit R. Shah
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Oct 14, 1988
Inventors
Melvin E. Kamen
Philip A. Bernstein
Amit R. Shah
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.