Granted Patent
Utility
US 4,835,199 · App. 07/037,287
Bituminous composition comprising a blend of bitumen and a thermoplastic elastomer
Inventors:
Shingo Futamura, Georg G. A. Bohm
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Apr 10, 1987
Inventors
Shingo Futamura
Georg G. A. Bohm
Assignee (at issue)
The Firestone Tire & Rubber 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.