Granted Patent
Utility
US 4,801,400 · App. 07/021,053
Epoxy pyrrolidone based non-ionic surfactants
Inventors:
Robert B. Login, Mohamed M. Hashem, David J. Tracy
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Mar 2, 1987
Inventors
Robert B. Login
Mohamed M. Hashem
David J. Tracy
Assignee (at issue)
GAF Corporation
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.