Granted Patent
Utility
US 4,321,087 · App. 06/126,011
Process for making metallic leafing pigments
Inventors:
Sol Levine, Melvin E. Kamen, August DeFazio, Peter Cueli
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Feb 29, 1980
Inventors
Sol Levine
Melvin E. Kamen
August DeFazio
Peter Cueli
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.