Granted Patent
Utility
US 4,775,393 · App. 06/868,954
Autogenous attrition grinding
Inventors:
Wolfgang D. G. Boecker, Tadeusz M. Korzekwa
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: May 30, 1986
Inventors
Wolfgang D. G. Boecker
Tadeusz M. Korzekwa
Assignee (at issue)
The Standard Oil 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.