US PATENT SUBCLASS 526 / 173
.~.~.~ Material contains elemental alkali metal, hydride thereof, or alkali metal to carbon atom bond (Li, Na, K, Rb, Cs, Fr)

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}
173.~.~.~ Material contains elemental alkali metal, hydride thereof, or alkali metal to carbon atom bond (Li, Na, K, Rb, Cs, Fr) {9}
174  DF  .~.~.~.~> Contains at least two diverse alkali metal atoms, at least one of which is in the form of a free alkali metal, or in the form of a hydride, or has an alkali metal to carbon atom bond
175  DF  .~.~.~.~> Contains two or more separate chemical entities containing atoms of the same alkali metal, with at least one atom in elemental form, or in the form of a hydride, or has an alkali metal to carbon atom bond
176  DF  .~.~.~.~> Contains heavy metal atom
177  DF  .~.~.~.~> Contains aluminum atom
178  DF  .~.~.~.~> Contains boron or silicon atom
179  DF  .~.~.~.~> Contains phosphorus atom
180  DF  .~.~.~.~> Contains compound of nitrogen
181  DF  .~.~.~.~> Contains oxygen atom
182  DF  .~.~.~.~> Contains halogen atom

DEFINITION

Classification: 526/173

(under subclass 89) Subject matter wherein the specified material contains an elemental alkali metal, and alkali metal hydride, or a compound containing an alkali metal bonded to a carbon atom.

(1) Note. Alkali metal is limited to the elements of Group IA and as such is limited to Li, Na, K, Rb, Cs, and Fr.

SEE OR SEARCH THIS CLASS, SUBCLASS:

90+, for processes of polymerizing in the presence of a transition metal atom and a Group IA element or compound thereof.

176, through 182, which may include compounds wherein the alkali metal is bonded to a carbon or hydrogen atom and in the same molecule there is also present at least one of the necessary elements required under the definitions of these subclasses.