US PATENT SUBCLASS 585 / 502
.~ By addition of entire unsaturated molecules, e.g., polymerization, etc.

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

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
502.~ By addition of entire unsaturated molecules, e.g., polymerization, etc. {8}
503  DF  .~.~> With heat conservation or using apparatus of recited composition
504  DF  .~.~> With specified procedure for recycle of nonhydrocarbon
505  DF  .~.~> Triple-bond product
506  DF  .~.~> Poly-double-bond product {2}
510  DF  .~.~> Definite molecular weight product, e.g., dimer, etc. {4}
517  DF  .~.~> Plural serial polymerization stages
518  DF  .~.~> With preliminary treatment of feed {1}
520  DF  .~.~> Using extraneous nonhydrocarbon agent, e.g., catalyst, etc. {5}

DEFINITION

Classification: 585/502

By addition of entire unsaturated molecules, e.g., polymerization, etc.:

(under subclass 500) Subject matter wherein at least two

hydrocarbon molecules, each having a double or triple bond, join to form an unsaturated compound having a molecular weight which equals the total of the molecular weight of the additive (monomer) molecules.

(1) Note. Where a reaction is stated to be "polymerization", "dimerization", etc., and all the reactants are unsaturated, it is assumed that the product is unsaturated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

361+, for addition of entire cyclic molecules to form a polycyclic nonaromatic product.

366, for cyclic polymerization of an alkadiene to produce an alicyclic compound.

406, dimerization of a vinyl aromatic compound.

415+, for cyclic polymerization of an acyclic material to produce an aromatic compound. 422+, for condensation of entire cyclic molecules, including reactions similar to those herein (subclasses 502+) where an aromatic ring is a "passive" substituent on an unsaturated chain, e.g., polymerization of styrene, etc.

SEE OR SEARCH CLASS

208, Mineral Oils: Processes and Products,

46, for processes of polymerizing or condensing mineral oils; subclass 20 for petroleum wax products; and subclasses 24+ for treatment of mineral paraffin wax.

520, Synthetic Resins or Natural Rubbers, for a polymerization process which results in a solid polymer, especially Class 526 for the polymerization of ethylenically unsaturated monomers. Where a patent has claims to production of both solid and nonsolid polymers or has claims only to a polymerization process which, according to the disclosure, may produce a solid polymer as a desired product, the patent is classified in the Class 520 series and cross-referenced here (

502+, ) when appropriate.