US PATENT SUBCLASS 530 / 212
.~.~.~ Chemical treatment or color modification of polymerized rosin or derivative, or product thereof (e.g., hydrogenation or esterification of polymerized rosin; removal of color bodies from polymerized rosin, etc.)

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}
211  DF  .~.~ Polymerization or product thereof (e.g., dimer rosin, etc.) {1}
212.~.~.~ Chemical treatment or color modification of polymerized rosin or derivative, or product thereof (e.g., hydrogenation or esterification of polymerized rosin; removal of color bodies from polymerized rosin, etc.)

DEFINITION

Classification: 530/212

(under subclass 211) Processes wherein polymerized rosin or a derivative thereof undergoes further chemical treatment or color modification, or products of such processes.