Granted Patent
Utility
US 6,675,589 · App. 10/370,987
Freeze-crusting process
Inventor:
David Howard
Patented Case
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Granted: Jan 13, 2004
Filed: Feb 20, 2003
Inventor
David Howard
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.