Granted Patent
Utility
US 5,470,508 · App. 08/195,128
Aqueous oil removal composition containing higher-alkyl pyrrolidone
Inventors:
Kolazi S. Narayanan, Ratan K. Chaudhuri, Robert B. Login, Frank Fusiak
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Feb 14, 1994
Inventors
Kolazi S. Narayanan
Ratan K. Chaudhuri
Robert B. Login
Frank Fusiak
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.