Granted Patent
Utility
US 4,440,520 · App. 06/176,554
Ice aggregate road and method and apparatus for constructing same
Inventor:
Edwin N. Fisher
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Aug 8, 1980
Inventor
Edwin N. Fisher
Assignee (at issue)
Atlantic Richfield 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.