Granted Patent
Utility
US 5,294,644 · App. 07/654,359
Surface active lactams
Inventors:
Robert B. Login, Ratan K. Chaudhuri, Rama Haldar, Mohamed M. Hashem, Michael W. Helioff, David J. Tracy
Patented Case
View Patent ↗
Granted: Mar 15, 1994
Filed: Feb 12, 1991
Inventors
Robert B. Login
Ratan K. Chaudhuri
Rama Haldar
Mohamed M. Hashem
Michael W. Helioff
David J. Tracy
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.