Granted Patent
Utility
US 5,718,752 · App. 08/728,456
Asphalt composition with improved processability
Inventor:
Robert Q. Kluttz
Patented Case
View Patent ↗
Granted: Feb 17, 1998
Filed: Oct 10, 1996
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.