US PATENT SUBCLASS 502 / 302
.~.~ Of lanthanide series (i.e., atomic number 57 to 71 inclusive)

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}
300  DF  .~ Metal, metal oxide or metal hydroxide {10}
302.~.~ Of lanthanide series (i.e., atomic number 57 to 71 inclusive) {2}
303  DF  .~.~.~> Lanthanum
304  DF  .~.~.~> Cerium

DEFINITION

Classification: 502/302

Of lanthanide series (i.e., atomic number 57 to 71 inclusive):

(under subclass 300) Composition in which the metal is selected from those with atomic numbers 57 to 71 (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu).

(1) Note. The metals Lanthanum and Actinium are not included in Group III for purposes of this class (502) but are considered with the lanthanides and actinides respectively.