Granted Patent
Utility
US 5,145,669 · App. 07/732,847
Sunscreen composition
Inventors:
Yoon T. Kwak, Stephen L. Kopolow, Michael W. Helioff, Mohammed Tazi
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Jul 19, 1991
Inventors
Yoon T. Kwak
Stephen L. Kopolow
Michael W. Helioff
Mohammed Tazi
Assignee (at issue)
ISP INVESTMENTS LLC
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.