US PATENT SUBCLASS 525 / 54.42
.~.~.~ Previously formed solid polymer chemically reacted with natural resin or derivative

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}
54.4  DF  .~.~ Containing chemically combined natural resin or derivative thereof other than tall oil {3}
54.42.~.~.~ Previously formed solid polymer chemically reacted with natural resin or derivative {1}
54.44  DF  .~.~.~.~> At least one previously formed solid polymer derived from ethylenic monomers only

DEFINITION

Classification: 525/54.42

Previously formed solid polymer chemically reacted with natural resin or derivative:

(under subclass 54.4) Subject matter wherein a natural resin or a derivative or a natural resin is chemically reacted with a previously formed solid polymer.

(1) Note. The previously formed solid polymer can itself contain chemically combined natural resin or derivative.