Granted Patent
Utility
US 5,180,428 · App. 07/814,066
In situ rejuvenation of aged and cracked asphalt pavement
Inventor:
Richard D. Koleas
Patented Case
View Patent ↗
Granted: Jan 19, 1993
Filed: Dec 24, 1991
Inventor
Richard D. Koleas
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.