US PATENT SUBCLASS 585 / 629
.~.~.~.~ Transition metal oxide or sulfide agent

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

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
601  DF  .~ Diolefin product {4}
616  DF  .~.~ By dehydrogenation {3}
627  DF  .~.~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc. {3}
629.~.~.~.~ Transition metal oxide or sulfide agent {1}
630  DF  .~.~.~.~.~> Cr, Mo, or W {1}

DEFINITION

Classification: 585/629

Transition metal oxide or sulfide agent:

(under subclass 627) Subject matter wherein a compound of one or more transition metals with oxygen only or sulfur only is an extraneous agent.

(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 (sandium through zinc), 39 through 48 (yttrium through cadmium), 57 through 80 (lanthanum through mercury), and 89 through 103 (actinium through lawrencium).