US PATENT SUBCLASS 502 / 221
.~.~.~ And Group VIII metal containing (i.e., iron or platinum group)

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

100  DF  CATALYST OR PRECURSOR THEREFOR {12}
216  DF  .~ Sulfur or compound containing same {3}
219  DF  .~.~ And Group VI metal containing (i.e., Cr, Mo, W or Po) {2}
221.~.~.~ And Group VIII metal containing (i.e., iron or platinum group)

DEFINITION

Classification: 502/221

And Group VIII metal containing (i.e., or iron or platinum group):

(under subclass 219) Composition additionally including an iron group or platinum group metal, free or chemically combined.