US PATENT SUBCLASS 530 / 228
.~.~ Purification process or product thereof


Current as of: June, 1999
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530 /   HD   CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF

200  DF  NATURAL RESINS OR DERIVATIVES (E.G., WOOD OR PINE TAR; CATIVO RESIN DERIVATIVES, ETC.) {6}
210  DF  .~ Rosin or derivative used as starting material in process, or product thereof (e.g., using gum rosin, wood rosin, solid tall oil rosin, etc.) {10}
228.~.~ Purification process or product thereof {1}
229  DF  .~.~.~> Immiscible solvents used in the process, or product thereof


DEFINITION

Classification: 530/228

(under subclass 210) Processes for purification of rosin or its derivatives, or products of such processes.