US PATENT SUBCLASS 423 / 538
.~.~.~.~ Oxygen containing catalyst

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

511  DF  SULFUR OR COMPOUND THEREOF {4}
512.1  DF  .~ Oxygen containing {11}
532  DF  .~.~ Sulfur trioxide {1}
533  DF  .~.~.~ Utilizing catalyst in reaction {4}
538.~.~.~.~ Oxygen containing catalyst

DEFINITION

Classification: 423/538

(under subclass 533) Processes wherein the catalyst contains oxygen, usually as the oxide of a metal.

SEE OR SEARCH CLASS

502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making,

100+, for specific catalysts.