Granted Patent
Utility
US 4,748,004 · App. 06/829,712
Apparatus for cleaning air ports of a chemical recovery furnace
Inventor:
Byron L. Goodspeed
Patented Case
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Granted: May 31, 1988
Filed: Feb 13, 1986
Inventor
Byron L. Goodspeed
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.