Granted Patent
Utility
US 5,139,770 · App. 07/628,122
Cosmetic compositions containing strongly swellable, moderately crosslinked polyvinylpyrrolidone
Inventors:
Jenn S. Shih, Jui-Chang Chuang, Terry E. Smith, Carmen D. Bires, Michael W. Helioff, Robert B. Login
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Dec 17, 1990
Inventors
Jenn S. Shih
Jui-Chang Chuang
Terry E. Smith
Carmen D. Bires
Michael W. Helioff
Robert B. Login
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.