US PATENT SUBCLASS 585 / 523
.~.~.~.~ Transition metal-containing

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

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
502  DF  .~ By addition of entire unsaturated molecules, e.g., polymerization, etc. {8}
520  DF  .~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc. {5}
521  DF  .~.~.~ Hydride or organic compound or complex containing alkaline-, B-, or Zn group material {2}
523.~.~.~.~ Transition metal-containing {1}
524  DF  .~.~.~.~.~> Ti

DEFINITION

Classification: 585/523

Transition metal-containing:

(under subclass 521) Subject matter wherein the catalyst contains one or more transition metals in free or combined form.

(1) Note. A transition metal is one in which an inner electron shell, rather than an outer shell, is partially filled. In the periodic table transition metals 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).