US PATENT SUBCLASS 528 / 220
.~ FROM KETONE OR KETENE REACTANT

Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
220.~ FROM KETONE OR KETENE REACTANT {4}
222  DF  .~.~> Polymerizing in the presence of a specified material other than a reactant {3}
226  DF  .~.~> With sulfur-containing reactant
227  DF  .~.~> With aldehyde or derivative thereof as reactant
228  DF  .~.~> With nitrogen-containing reactant {1}

DEFINITION

Classification: 528/220

(under subclass 1) Subject matter under Class 520, ... involving polymers derived from a ketone reactant or processes of polymerizing; polymerizable compositions containing as a reactant a ketone or process of preparing.

(1) Note. For purposes of this subclass a reactant having a ketene ( C=C=O) group is considered as being a ketone.

SEE OR SEARCH THIS CLASS, SUBCLASS:

480+, for processes of preparing a polymer not involving a chemical modification of the polymer, by the addition of a material thereto, and for chemically modifying material other than the polymer. Subclasses 480+ also provide for processes of admixing with a broadly claimed nonreactant material.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary

for a definition of the term "ketone". 526, Synthetic Resins or Natural Rubbers,

316, for a polymer derived from an ethylenically unsaturated ketone as sole monomer or for an interpolymer derived from only ethylenically unsaturated reactants wherein at least one of the reactants is an ethylenically unsaturated ketone.