US PATENT SUBCLASS 502 / 407
.~ Silicon containing

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

400  DF  SOLID SORBENT {6}
407.~ Silicon containing {6}
408  DF  .~.~> Acid treated
409  DF  .~.~> Quartz
410  DF  .~.~> Magnesium silicate (e.g., abestos, vermiculite, etc.)
411  DF  .~.~> Having extraneously added alkali metal, or alkaline earth metal
412  DF  .~.~> Diatomaceous earth
413  DF  .~.~> Free carbon containing

DEFINITION

Classification: 502/407

Silicon containing:

(under subclass 400) Composition in which there is element number 14, free or chemically combined.

SEE OR SEARCH THIS CLASS, SUBCLASS:

60+, for a clay or zeolite composition.

405, for a silica gel sorbent.