US PATENT SUBCLASS 422 / 904
NITROGEN FIXATION MEANS

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

904NITROGEN FIXATION MEANS

DEFINITION

Classification: 422/904

NITROGEN FIXATION MEANS:

Art collection relevant to subclasses 186+ comprising documents disclosing the separation of nitrogen as nitrogen compounds from the other components of air.