Granted Patent
Utility
US 4,560,207 · App. 06/585,051
Method and apparatus for fragmenting asphalt
Inventors:
Larry G. Eftefield, Gerald P. Simmons, Gregory Lincoln Stone
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Mar 1, 1984
Inventors
Larry G. Eftefield
Gerald P. Simmons
Gregory Lincoln Stone
Assignee (at issue)
Caterpillar Tractor Co.
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.