US PATENT SUBCLASS 585 / 489
.~.~.~.~ Transition metal-containing catalyst

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
483  DF  .~ By dealkylation {2}
486  DF  .~.~ Using extraneous agent in reaction zone, e.g., catalyst, etc. {2}
488  DF  .~.~.~ And H {1}
489.~.~.~.~ Transition metal-containing catalyst

DEFINITION

Classification: 585/489

Transition metal-containing catalyst:

(under subclass 488) Subject matter catalyzed by a material containing, in free or combined form, a metal in which an inner electron shell, rather than an outer shell, is partially filled.

(1) Note. In the periodic table transition metals include elements 21 - 30 (scandium - zinc), 39 - 48 (yttrium - cadmium), 57 - 80 (lanthanum - mercury), and 89 - 103 (actinium - lawrencium).