Title: Thermal insulation structure

Abstract: A double-walled, hermetically sealed structure with the cavity between the walls containing a polyurethane foam blown with a fluorinated hydrocarbon. During fabrication the cavity is evacuated to remove air and water vapor and then refilled with a fluorinated hydrocarbon.

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Inventors: Adorjan, Alexander S. (Pearland, TX, US)

Application Number: 540509
Filing Date: 1975-01-13
Publication_date: 1979-02-13
Assignee: General Electric Company (Fairfield, CT)
Primary Class(es): 138/149 62/465, 138/DIG9, 428/69
Other Classes:
US Patent Ref:

2779066	Jan, 1957	Gaugler et al.	62/DIG.
2962183	Nov, 1960	Rill et al.	62/DIG.
3007596	Nov, 1961	Matsch	62/DIG.
3091946	Jun, 1963	Kesling	264/46.
3280849	Oct, 1966	Rendos et al.	138/149.
3390703	Jul, 1968	Matlow	138/149.
3392220	Jul, 1968	Jennings	264/46.
3531233	Sep, 1970	Max	264/46.
3554237	Jan, 1971	Pelley et al.	138/149.
3556158	Jan, 1971	Schneider	264/46.
3693665	Sep, 1972	Veerling et al.	138/149.
3728187	Apr, 1973	Martin	138/149.

Other Refs:
Primary Examiner: Phillips, Charles E.
Assistant Examiner: Bryant, III, James E.
Attorney: