US PATENT SUBCLASS 62 / 934
.~ From nitrogen

Current as of: June, 1999
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62 /   HD   REFRIGERATION

931  DF  Recovery of hydrogen {3}
934.~ From nitrogen

DEFINITION

Classification: 62/934

From nitrogen:

Subject matter under 931 specific to the separation of hydrogen from nitrogen, including the separation of ammonia and the separation of N2[end subscrpt]/H2 wherein N2[end subscrpt] is used as a liquid wash for H2[end subscrpt] impurities.