Granted Patent
Utility
US 5,994,385 · App. 09/191,736
Personal care product including a derivatized polymer of maleic anhydride alkyl half-ester or full acid, maleamic acid and maleimide units
Inventors:
Herbert Ulmer, John Katirgis, Timothy Gillece
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Nov 13, 1998
Inventors
Herbert Ulmer
John Katirgis
Timothy Gillece
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.