Granted Patent
Utility
US 4,885,158 · App. 07/188,522
Heat stable quaternized lactams having oxylated sulfur anions
Inventors:
David J. Tracy, Thomas Rizzo, Robert B. Login
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Apr 29, 1988
Inventors
David J. Tracy
Thomas Rizzo
Robert B. Login
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.