US PATENT SUBCLASS 585 / 426
.~.~.~ Through residue of nonring molecule, e.g., acetylene, etc.

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

400  DF  AROMATIC COMPOUND SYNTHESIS {15}
422  DF  .~ By condensation of entire cyclic molecules or entire hydrocarbyl moieties thereof, e.g., polymerization, etc. {4}
425  DF  .~.~ Ring carbon of one molecule joined to ring carbon of other {2}
426.~.~.~ Through residue of nonring molecule, e.g., acetylene, etc.

DEFINITION

Classification: 585/426

Through residue of nonring molecule, e.g., acetylene, etc.:

(under subclass 425) Subject matter in which a moiety, present as an acyclic molecule in the feedstock, is present between the joined rings of the product.