US PATENT SUBCLASS 530 / 500
LIGNINS OR DERIVATIVES

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

500LIGNINS OR DERIVATIVES {7}
501  DF  .~> Aldehyde, ketone or ozone reacted with a lignin or lignin containing substance, or product thereof
502  DF  .~> Compound which includes phenolic hydroxy or oxygen containing hetero ring reacted with a lignin or lignin containing substance, or product thereof
503  DF  .~> Hydrogenation of a lignin or lignin containing substance, or product thereof
504  DF  .~> Carboxylic acid anhydride, or a compound having halogen bonded directly to acyclic carbon by nonionic bonding, reacted with a lignin or lignin containing substance, or product thereof
505  DF  .~> Compound containing nitrogen attached directly or indirectly to carbon by nonionic bonding reacted with a lignin or lignin containing substance, or product therof
506  DF  .~> Heavy metal, aluminum, silicon or phosphorus containing
507  DF  .~> Processes utilizing an organic solvent or a compound having alcoholic hydroxy bonded directly to an acyclic carbon, or product thereof

DEFINITION

Classification: 530/500

Lignins, i.e., the Major Noncarbohydrate Constituents of Wood and Woody Plants, or Reaction Products Thereof.

(1) Note. The chemical treatment of source materials such

as, for example, waste sulfite liquor or black liquor, to derive therefrom a lignin-containing substance is included herein, unless said treatment produces a definite carbon compound which is specifically provided for elsewhere.

(2) Note. The rules for determining Class placement of the Original Reference (OR) for claimed chemical compositions are set forth in the Class Definition of Class 252 in the SECTION LINES WITH OTHER CLASSES AND WITHIN THIS CLASS, subsection COMPOSITION CLASS SUPERIORITY, which includes a hierarchical ORDER OF SUPERIORITY FOR COMPOSITION CLASSES.

SEE OR SEARCH CLASS

8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers, for tanning agents derived from waste cellulose liberation liquors.

117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor, for processes for growing therein-defined single-crystal of all types of materials, including inorganic or organic.

162, Paper Making and Fiber Liberation, for processes of liberating cellulosic fibers which include the recovery of an organic by-product.

562, Organic Compounds, 513, for the production of oxalic acid from waste sulfite liquor.