US PATENT SUBCLASS 526 / 209
.~.~.~ Material contains ether

Current as of: June, 1999
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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}
89  DF  .~.~ Polymerizing in the presence of a specified material other than monomer {28}
209.~.~.~ Material contains ether

DEFINITION

Classification: 526/209

(under subclass 89) Subject matter wherein the polymerization reaction is conducted in the presence of at least one compound which contains at least one oxygen atom bonded to two discrete organic radicals and having the general formula, i.e., -C-O-C-.

(1) Note. This subclass includes ethers derived from phenols.

(2) Note. This subclass does not include nonmetallic ether complexes of a boron trihalide or of an aluminum trihalide.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213+, for a polymerization process in the presence of a carboxylic acid, R -0H, OR ester, salt or anhydride thereof.

237+, for a process of polymerizing in the presence of an etherate complex of boron trihalide or aluminum trihalide (e.g., BF3 -etherate, etc.)

SEE OR SEARCH CLASS 520, Synthetic Resins or Natural Rubbers, Glossary, for a definition of the term "ether".