US PATENT SUBCLASS 502 / 239
.~.~.~.~ Of Group IV metal (i.e., Ti, Zr, Hf, Ge, Sn or Pb)

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}
232  DF  .~ Silicon containing or process of making {2}
233  DF  .~.~ Forming silica gel {2}
237  DF  .~.~.~ Metal, metal oxide, or metal hydroxide containing {2}
239.~.~.~.~ Of Group IV metal (i.e., Ti, Zr, Hf, Ge, Sn or Pb)

DEFINITION

Classification: 502/239

Of Group IV metal (i.e., Ti, Zr, Hf, Ge, Sn or Pb):

(under subclass 237) Process including a Group IV metal, metal oxide or hydroxide.