US PATENT SUBCLASS 528 / 277
.~.~.~.~.~ Material contains a transition 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}
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}
277.~.~.~.~.~ Material contains a transition metal atom {3}
278  DF  .~.~.~.~.~.~> Metal atom has atomic number of 57-71, or 89 and higher
279  DF  .~.~.~.~.~.~> Material contains a Group IVB metal atom (Ti, Zr, Hf)
280  DF  .~.~.~.~.~.~> Material contains a Group VIII metal atom (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt)


DEFINITION

Classification: 528/277

(under subclass 275) Subject matter wherein the specified material contains at least one atom of a transition metal.

(1) Note. Transition metal atom is limited to elements of atomic numbers 21-29, 39-47, 57-79, 89, and higher.