Granted Patent
Utility
US 4,492,781 · App. 06/496,148
Method and composition for maintaining and repairing asphalt-and rubber-containing surfaces
Inventors:
Francis J. Duszak, James P. Modrak, Dick Deaver
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: May 19, 1983
Inventors
Francis J. Duszak
James P. Modrak
Dick Deaver
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.