Granted Patent
Utility
US 4,416,696 · App. 06/418,703
Method for heat treating cement clinker raw materials
Inventors:
Steven J. Zagar, James L. Shy
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Sep 16, 1982
Inventors
Steven J. Zagar
James L. Shy
Assignee (at issue)
Allis-Chalmers 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.