Granted Patent
Utility
US 4,911,362 · App. 07/316,960
Method and apparatus for making carbon dioxide snow
Inventor:
David Delich
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Feb 28, 1989
Inventor
David Delich
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.