US PATENT SUBCLASS 423 / 649
.~.~ Ortho-para conversion

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

644  DF  HYDROGEN OR COMPOUND THEREOF {3}
648.1  DF  .~ Elemental hydrogen {6}
649.~.~ Ortho-para conversion

DEFINITION

Classification: 423/649

(under subclass 648.1) Processes including the conversion of ortho hydrogen to para hydrogen (i.e., protons of molecules spin in same or opposite directions, respectively or vice versa).