US PATENT SUBCLASS 585 / 518
.~.~ With preliminary treatment of feed

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}
518.~.~ With preliminary treatment of feed {1}
519  DF  .~.~.~> Removal of hydrocarbon fraction

DEFINITION

Classification: 585/518

With preliminary treatment of feed:

(under subclass 502) Subject matter wherein the feed to polymerization is the effluent from a nonsynthesis treatment, usually a purification treatment, heating treatment, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

503, for an olefin polymerization process in which the feed pretreatment is heating and the heat is that abstracted from reaction products of the process.

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526, Synthetic Resins or Natural Rubbers,

77, for a process in which an olefin monomer is purified preliminary to its polymerization into a solid polymer.