Granted Patent
Utility
US 4,336,689 · App. 06/282,256
Process for delivering liquid cryogen
Inventor:
Robert B. Davis
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Jul 10, 1981
Inventor
Robert B. Davis
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.