Granted Patent
Utility
US 5,026,564 · App. 07/548,492
Apparatus and method for treatment of various liquid or slurry by ultrasonification in conjuction with heat and pressure
Inventor:
Steven Mark Hayden
Patented Case
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Granted: Jun 25, 1991
Filed: Jul 2, 1990
Inventor
Steven Mark Hayden
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.