US PATENT SUBCLASS 530 / 230
.~ Tall oil or derivative used as starting material in process, or product thereof (e.g., metal salts of tall oil fatty acids; tall oil pitch, etc.) dehydrogenated, or isomerized 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}
230.~ Tall oil or derivative used as starting material in process, or product thereof (e.g., metal salts of tall oil fatty acids; tall oil pitch, etc.) dehydrogenated, or isomerized rosin; etc.) {3}
231  DF  .~.~> Nitrogen containing material used in the process, or product thereof
232  DF  .~.~> Esterification of tall oil acids, or product thereof
233  DF  .~.~> Sulfur, boron, phosphorus, or iodine containing material used in the process, or product thereof

DEFINITION

Classification: 530/230

(under subclass 200) Processes wherein the starting material used is tall oil or a derivative thereof, or products of such processes.

(1) Note. Tall oil is a by-product of the wood pulp industry and is usually recovered from pine wood "black liquor" of the sulfate or kraft paper processes. A typical composition of tall oil includes 50-60% fatty acids (e.g., oleic, linoleic, etc.), 34-40% rosin acids, and 5-10% unsaponifiable matter, such as long chain alcohols and sterols.

(2) Note. Although "tall oil fatty acids" contain at least 90% of free fatty acids, they are included among natural resins because of a measurable content of rosin acids (up to 10%).

(3) Note. Compositions containing tall oil or its reaction product as an ingredient thereof and having a known utility are classified in the appropriate composition class providing therefor.