Granted Patent
Utility
US 5,859,161 · App. 08/161,418
Silicone phosphate esters as irritation mitigants
Inventors:
John Imperante, Anthony J. O'Lenick, Jr.
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Dec 6, 1993
Inventors
John Imperante
Anthony J. O'Lenick, Jr.
Assignees (at issue)
Phoenix Chemicals Limited
Lambent Technologies Inc.
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.