Granted Patent
Utility
US 4,430,465 · App. 06/360,303
Asphalt composition
Inventor:
Clifford E. Abbott
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Mar 22, 1982
Inventor
Clifford E. Abbott
Assignee (at issue)
Phillips Petroleum 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.