US PATENT SUBCLASS 525 / 161
.~.~.~.~.~ Solid polymer derived from ethylenic reactants only derived from reactant containing a heterocyclic ring or fused-, bridged-ring system excluding an anhydride group which produces the fused- or bridged-ring system or heterocyclic ring

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}
154  DF  .~.~.~ With saturated aldehyde or aldehyde derivative (including methylol ethers or condensates) reactant or solid polymer thereof; or with solid copolymer derived from at least one aldehyde or aldehyde derivative reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with SPFI wherein at least one of the necessary ingredients is an aldehyde or aldehyde derivative reactant or with a reaction product thereof; or with SICP containing an aldehyde or aldehyde derivative {3}
157  DF  .~.~.~.~ Contacting with an amine, a material containing a N-C(=X)- or N-S(=O)- (X is chalcogen) reactant and an aldehyde or aldehyde derivative at least one of which is saturated, their condensate or solid polymer thereof {7}
161.~.~.~.~.~ Solid polymer derived from ethylenic reactants only derived from reactant containing a heterocyclic ring or fused-, bridged-ring system excluding an anhydride group which produces the fused- or bridged-ring system or heterocyclic ring

DEFINITION

Classification: 525/161

Solid polymer derived from ethylenic reactants only derived from reactant containing a heterocyclic ring or a fused- or bridged-ring system excluding an anhydride group which produces the fused- or bridged-ring system or heterocyclic ring:

(under subclass 157) Subject matter wherein the solid polymer is derived from or reacted with ethylenic reactant containing a heterocyclic ring, fused- or bridged-ring system other than solely from cyclic anhydrides.

(1) Note. Excluded from this subclass are ethylenic reactants that contain a single heterocyclic ring and which ring is a cyclic anhydride. Also excluded from this subclass are those compounds which are bridged or fused solely by virtue of a cyclic anhydride ring fused or bridged to another

ring. This subclass does include cyclic anhydride rings when in combination with other heterocyclic rings or compounds which may have a ring system such as,

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural rubbers, the Glossary, for a definition of the term "fused or bridged ring systems".