US PATENT SUBCLASS 585 / 435
.~ Having alkenyl moiety, e.g., styrene, etc.

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
435.~ Having alkenyl moiety, e.g., styrene, etc. {4}
436  DF  .~.~> Polycyclic product or from nonhydrocarbon feed {1}
438  DF  .~.~> By condensation using metal-containing catalyst
439  DF  .~.~> By C removal, e.g., cracking, etc.
440  DF  .~.~> By dehydrogenation {4}

DEFINITION

Classification: 585/435

Having alkenyl moiety, e.g., styrene, etc.:

(under subclass 400) Subject matter in which the aromatic product of the synthesis process has olefinic or acetylenic unsaturation in a sidechain or other acyclic moiety.

(1) Note. Synthesis of an alkenyl aryl by disproportionation, i.e., transalkylation, is properly classified in this subclass.