US PATENT SUBCLASS 252 / 519.32
.~.~.~ The organic compound is a natural resin, protein, lignin, carbohydrate, or derivative thereof

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

500  DF  ELECTRICALLY CONDUCTIVE OR EMISSIVE COMPOSITIONS {6}
518.1  DF  .~ Metal compound containing {16}
519.3  DF  .~.~ With organic compound {3}
519.32.~.~.~ The organic compound is a natural resin, protein, lignin, carbohydrate, or derivative thereof

DEFINITION

Classification: 252/519.32

The organic compound is a natural resin, protein, lignin, carbohydrate, or derivative thereof:

(under subclass 519.3) Compositions wherein the organic compound is a natural resin, protein, lignin, carbohydrate, or derivative thereof.

(1) Note. Natural resins include but are not limited to shellac, copals from various sources (e.g., congo, manila, etc.), amber, dammar, dead dammar, gum rosin, japan, japan varnish, rosin (colophony), tall oil (liquid rosin), wood rosin, burgundy pitch, gurjun balsam, canada balsam, sandrac, mastic, accroides, benzoin, elemi, gamboge, gum thus, venice turpentine, bordeaux turpentine, abietic acid, pimaric acid, etc.

(2) Note. Examples of derivatives of natural resins included herein are hydrogenated, esterified, polymerized, or sulfurized natural resins, or salts thereof.

(3) Note. Protein is a naturally occurring polypeptide (polyamide) of more than 100 a-amino acid residues or of molecular weight greater than 10,000.

(4) Note. Lignin is a noncarbohydrate, polymeric substance found in wood and woody plants which functions as a natural plastic binder for the cellulose fibers. It is isolated directly from wood or wood products or from the treatment of wood (e.g., waste sulfite liquor or black liquor). The structure of the lignin monomer is not completely known.

(5) Note. The term "carbohydrate or derivative" in this subclass corresponds to the Class 536, subclass 1.1 definition (i.e., a carbohydrate is a saccharide whose monomeric units are polyhydroxy monoaldehydes or polyhydroxy monoketones, having the formula Cn[end subscrpt](H2O)n[end subscrpt] (wherein n is five or six), or the corresponding cyclic hemiacetals thereof, or the reaction derivatives thereof in which the product is of indeterminate structure or the carbon skeleton and the carbonyl function or hemi-acetal function of the saccharide unit are not destroyed).