US PATENT SUBCLASS 525 / 54.4
.~.~ Containing chemically combined natural resin or derivative thereof other than tall oil

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.~.~ Containing chemically combined natural resin or derivative thereof other than tall oil {3}
54.41  DF  .~.~.~> Shellac
54.42  DF  .~.~.~> Previously formed solid polymer chemically reacted with natural resin or derivative {1}
54.45  DF  .~.~.~> Previously formed solid polymer containing chemically combined natural resin or derivative admixed with an ethylenic agent or a chemical treating agent other than SICP or SPFI

DEFINITION

Classification: 525/54.4

Containing chemically combined natural resin or derivative thereof other than tall oil:

(under subclass 50) Subject matter wherein there is a chemically combined natural resin or natural resin derivative.

(1) Note. Natural resins include such materials as have customarily been employed as such in the paint, lacquer, varnish, adhesive, and ink trades. Examples of these materials are: shellac, rosin, abietic acid, etc.

(2) Note. Rosin derivatives are materials which retain the abietyl ring structure even though hydrogenated or substituted (e.g., zinc resinate, abietyl alcohol, disproportionated rosin, colophony, dehydroabietic acid, etc.).

(3) Note. The natural resin or derivative can be present as a chemical constituent of a SP or SICP, a reactant with a SP, SICP, or SPFI system, or as an ethylenic agent.

(4) Note. Tall oil, per se, is not treated herein as a natural resin unless a substantial rosin content is specifically stated; otherwise, tall oil as a reactant is treated as an unsaturated fatty acid in the subclasses herein below.