Granted Patent
Utility
US 5,326,880 · App. 08/026,314
Asymmetrical polypyrrolidonyl compounds having a wide liquid range
Inventors:
William L. Mandella, Paul D. Taylor, Terry E. Smith
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Mar 2, 1993
Inventors
William L. Mandella
Paul D. Taylor
Terry E. Smith
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.