US PATENT SUBCLASS 528 / 57
.~.~.~.~ Material contains at least one group IA or group IIA metal atom


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}
44  DF  .~ FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. {17}
48  DF  .~.~ Process of polymerizing in the presence of a specified material other than reactant {5}
55  DF  .~.~.~ Material contains at least one metal atom {3}
57.~.~.~.~ Material contains at least one group IA or group IIA metal atom


DEFINITION

Classification: 528/57

(under subclass 55) Subject matter wherein the specified material contains at least one atom of Group IA or Group IIA metal atom.

(1) Note. Group IA metal atoms are limited to Li, Na, K, Rb, Cs, Fr. Group IIA metal atoms are limited to Be, Mg, Ca, Sr, Ba, Ra.