US PATENT SUBCLASS 423 / 213.5
.~.~.~ Group VIII element


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

210  DF  MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE {11}
212  DF  .~ Mixture is exhaust from internal-combustion engine {1}
213.2  DF  .~.~ Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element {2}
213.5.~.~.~ Group VIII element


DEFINITION

Classification: 423/213.5

(under subclass 213.2) Processes in which the transition element is one which appears in Group VIII of the Periodic Table.