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http://www.google.com.au/patents/US3355859?utm_source=gb-gplus-share
Patent US3355859 - SELECTIVE ADSORPTION OF GASES AT LOW TEMPERATURE
SELECTIVE ADSORPTION OF GASES AT LOW TEMPERATURE
Ernst Karwat et al
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Abstract
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Description
Claims
Patent number
: 3355859
Filing date
: 13 Feb 1964
Issue date
: 5 Dec 1967
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