Granted Patent
Utility
US 5,110,585 · App. 07/317,481
Quaternized nitrogen containing polycyclic compounds
Inventors:
Ratan K. Chaudhuri, David J. Tracy, Robert B. Login, Michael W. Helioff
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Mar 1, 1989
Inventors
Ratan K. Chaudhuri
David J. Tracy
Robert B. Login
Michael W. Helioff
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.