US PATENT SUBCLASS 585 / 520
.~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc.

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

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
502  DF  .~ By addition of entire unsaturated molecules, e.g., polymerization, etc. {8}
520.~.~ Using extraneous nonhydrocarbon agent, e.g., catalyst, etc. {5}
521  DF  .~.~.~> Hydride or organic compound or complex containing alkaline-, B-, or Zn group material {2}
525  DF  .~.~.~> B-containing catalyst
526  DF  .~.~.~> S-containing catalyst
527  DF  .~.~.~> N- or P-containing catalyst {2}
530  DF  .~.~.~> Catalyst containing inorganic metal {2}

DEFINITION

Classification: 585/520

Using extraneous nonhydrocarbon agent, e.g., catalyst, etc.:

(under subclass 502) Subject matter wherein part or all of the synthesis takes place in the presence of a material which chemically effects the synthesis by promoting, retarding,

etc., but which does not form a part of the desired product and is, at least in theory, separable from the desired reaction products. The agent may be a catalyst, solvent, etc., and is inorganic or is an organic material containing other elements than carbon and hydrogen.

(1) Note. Where the claims recite merely a "polymerization" process but there appears to be a clear intent to maximize the production of a particular compound, e.g., a dimer, etc., the patent is placed in subclasses 510+ and cross-referenced here (subclasses 520+) when appropriate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

403, 503, 537, 636, and 920, for hydrocarbon syntheses which employ apparatus of recited composition, in some cases the composition (e.g., a reactor lining) being or containing a catalyst agent.

507, for a process wherein polyolefins are reacted in the presence of a catalyst.

510+, for a process wherein olefins are reacted in the presence of a catalyst to produce definite molecular weight products.