06151900 is referenced by 2 patents and cites 11 patents.

A system and method for cooling a first cryogenic liquid in a vessel comprises the steps of directing a second cryogenic into the first cryogenic fluid and releasing gas from the vessel. The first cryogenic fluid has a boiling point that is higher than the boiling point of the second cryogenic fluid. Directing the second cryogenic fluid into the first cryogenic fluid results in the second fluid cooling the first fluid and the second fluid vaporizing. The vaporized fluid is released as a gas from the vessel. The vessel may be a propellant tank for a space vehicle. The first and second cryogenic fluids are delivered from supplies located outside of the vehicle. The first cryogenic liquid may be oxygen and the second cryogenic liquid may be nitrogen, neon, or helium. In another aspect of the invention, the first cryogenic liquid may be hydrogen and the second cryogenic liquid may be helium.

Title
Cryogenic densification through introduction of a second cryogenic fluid
Application Number
9/262754
Publication Number
6151900
Application Date
March 4, 1999
Publication Date
November 28, 2000
Inventor
David L Gerhardt
Redondo Beach
CA, US
John E Davis
Claremont
CA, US
Timothy L Gaynor III
Cypress
CA, US
Michael V Merlin
Anaheim
CA, US
James F Weber
Moorpark
CA, US
Gene Rogers
San Pedro
CA, US
Tibor I Lak
Huntington Beach
CA, US
Agent
Stout Uxa Buyan & Mullins
Agent
Donald E Stout
Assignee
Boeing Northamerican
CA, US
IPC
F25B 19/00
F17C 5/02
F17C 11/00
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