Granted Patent
Utility
US 4,373,908 · App. 06/323,896
Kiln shell nozzle with annular fluid delivery
Inventors:
Peter J. Petit, Walter J. Hartwig
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Nov 23, 1981
Inventors
Peter J. Petit
Walter J. Hartwig
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.