US PATENT SUBCLASS 525 / 330.9
.~.~.~.~.~.~ Vulcanized or crosslinked, in the presence of a chemical treating agent, e.g., cured, etc.

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
326.1  DF  .~.~.~ Chemically after treated solid polymers derived from ethylenically unsaturated monomers only {24}
330.7  DF  .~.~.~.~ Polymer derived from halogen monomer {2}
330.8  DF  .~.~.~.~.~ At least one monomer contains two or more ethylenic groups {3}
330.9.~.~.~.~.~.~ Vulcanized or crosslinked, in the presence of a chemical treating agent, e.g., cured, etc. {1}
331.1  DF  .~.~.~.~.~.~.~> Nitrogen containing chemical treating agent

DEFINITION

Classification: 525/330.9

Vulcanized or crosslinked, in the presence of a chemical treating agent, e.g., cured, etc.:

(under subclass 330.8) Products wherein a chemical modification is described as vulcanization or cross-linking using a chemical treating agent.

(1) Note. The terms curing or hardening are presumed to be synonymous with vulcanizing or cross-linking in the absence of disclosure to the contrary. For the instant subclass, any other language will be sufficient which shows that the chemical modification changes the system from thermoplastic (or soluble) to thermosetting (or insoluble). The term chain-extending is presumed not to express cross-linking in the absence of disclosure to the contrary.

(2) Note. Vulcanizable compositions are not subject matter for this subclass unless prior to the vulcanization or cross-linking step there is present a chemically modified solid polymer derived from ethylenic monomers only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337, through 388, for vulcanizable or cross-linkable compositions.