US PATENT SUBCLASS 62 / 629
.~.~.~.~ Solidification
Current as of:
June, 1999
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62 /
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REFRIGERATION
600
DF
CRYOGENIC TREATMENT OF GAS OR GAS MIXTURE
{4}
617
DF
.~ Separation of gas mixture {3}
618
DF
.~.~ Natural gas {5}
620
DF
.~.~.~ Distillation {9}
629
.~.~.~.~ Solidification
DEFINITION
Classification: 62/629
Solidification:
(under subclass 620) Subject matter wherein the gas or gas mixture or products of separation are separated by being formed into solids.