Granted Patent
Utility
US 4,576,557 · App. 06/504,435
Cryogenic liquid pump
Inventor:
Boris Pevzner
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Jun 15, 1983
Inventor
Boris Pevzner
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.