US PATENT SUBCLASS 528 / 276
.~.~.~.~.~ Metal atom in elemental form

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}
271  DF  .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10}
272  DF  .~.~ From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof {15}
274  DF  .~.~.~ Polymerizing in the presence of a specified material other than reactant {2}
275  DF  .~.~.~.~ Material contains a metal atom {6}
276.~.~.~.~.~ Metal atom in elemental form

DEFINITION

Classification: 528/276

(under subclass 275) Subject matter wherein the metal atom is in the elemental state.

(1) Note. An alloy is considered as being a mixture of elemental metals and is proper for this subclass.