US PATENT SUBCLASS 585 / 275
.~ Using transition metal-containing catalyst

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

250  DF  ADDING HYDROGEN TO UNSATURATED BOND OF HYDROCARBON, I.E., HYDROGENATION {10}
275.~ Using transition metal-containing catalyst {2}
276  DF  .~.~> Elemental Co, Fe, or Ni
277  DF  .~.~> Group VIII metal with additional nonhydrocarbon agent or complexed with hydrocarbon

DEFINITION

Classification: 585/275

Using transition metal-containing catalyst:

(under subclass 250) Subject matter wherein the reaction takes place in the presence of a catalyst containing a transition metal in free or combined form.

(1) Note. The transition metals are elements in which an inner electron shell, rather than an outer shell, is partially filled. In the periodic table they include elements 21 through 30 (scandium through zinc), 39 through 48 (yttrium through cadmium), 57 through 80 (lanthanum through mercury), and 89 through 103 (actinium through lawrencium).