Granted Patent
Utility
US 4,849,020 · App. 07/040,274
Asphalt compounds and method for asphalt reconditioning using microwave radiation
Inventors:
Tracy L. Osborne, William R. Hutcheson
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Apr 20, 1987
Inventors
Tracy L. Osborne
William R. Hutcheson
Assignee (at issue)
TITAN COMPANY LIMITED
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.