US PATENT SUBCLASS 526 / 336
.~.~.~ Ethylenic groups are non-conjugated, e.g., divinylbenzene, etc.

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


526 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
335  DF  .~.~ From hydrocarbon monomer containing at least two ethylenic groups, e.g., butadiene, etc. {9}
336.~.~.~ Ethylenic groups are non-conjugated, e.g., divinylbenzene, etc.

DEFINITION

Classification: 526/336

(under subclass 335) Subject matter wherein two or more ethylenically unsaturated groups are (1) separated from each other either by an aromatic ring (e.g., divinyl benzene), or (2) separated by at least one carbon atom of an acyclic carbon chain which carbon atom is not part of a methine group (e.g., -C=C-C-C=C-, etc.), or (3) wherein two ethylenically unsaturated groups share a single carbon atom (e.g., C=C=C, etc.).