Granted Patent
Utility
US 4,313,573 · App. 06/124,480
Two stage comminution
Inventors:
William M. Goldberger, Harold M. Epstein, Bhupendra K. Parekh
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Feb 25, 1980
Inventors
William M. Goldberger
Harold M. Epstein
Bhupendra K. Parekh
Assignee (at issue)
Battelle Development Corporation
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.