Granted Patent
Utility
US 4,373,909 · App. 06/323,897
Gas injecting kiln shell nozzle with particle entry barriers
Inventors:
Peter J. Petit, Thomas J. Gill
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Nov 23, 1981
Inventors
Peter J. Petit
Thomas J. Gill
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.