Granted Patent
Utility
US 4,852,358 · App. 07/219,666
Cryogenic combination tunnel freezer
Inventors:
Arun Acharya, Jeffert John Nowobilski
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jul 16, 1988
Inventors
Arun Acharya
Jeffert John Nowobilski
Assignee (at issue)
Union Carbide Corporation
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.