Granted Patent
Utility
US 6,622,513 · App. 09/748,646
Freeze-crusting process and apparatus
Inventor:
David Howard
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Dec 21, 2000
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.