Granted Patent
Utility
US 5,322,867 · App. 08/105,549
Asphalt amine functionalized polymer composition
Inventor:
Robert Q. Kluttz
Patented Case
View Patent ↗
Granted: Jun 21, 1994
Filed: Aug 12, 1993
Inventor
Robert Q. Kluttz
Assignee (at issue)
SHELL OIL COMPANY
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.