Granted Patent
Utility
US 6,800,103 · App. 09/776,036
Secondary amine mannich detergents
Inventors:
Dennis J. Malfer, Andrea T. Noble, William J. Colucci, Roger M. Sheets
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Feb 2, 2001
Inventors
Dennis J. Malfer
Andrea T. Noble
William J. Colucci
Roger M. Sheets
Assignee (at issue)
Ethyl 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.