US PATENT SUBCLASS 524 / 72
.~.~.~ Lignin or tannin or derivative DNRM

Current as of: June, 1999
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524 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
72.~.~.~ Lignin or tannin or derivative DNRM {4}
73  DF  .~.~.~.~> Reaction product of lignin or tannin or derivative with an oxygen or nitrogen-containing organic reactant
74  DF  .~.~.~.~> Solid polymer or specified intermediate condensation product derived from a phenolic compound
75  DF  .~.~.~.~> Solid polymer contains halogen
76  DF  .~.~.~.~> Solid polymer derived from ethylenically unsaturated hydrocarbon only

DEFINITION

Classification: 524/72

Lignin or tannin or derivative DNRM:

(under subclass 1) Subject matter wherein a solid polymer or specified intermediate condensation product is admixed with a designated nonreactant material which is lignin or tannin or derivative thereof:

(1) Note. See the Class 520 Glossary for a definition of the term "lignin or derivative".

(2) Note. Chemically, tannins appear to be esters of Gallic acid whose -COOH is estrified by a second Gallic acid molecule or glucosioes thereof.

(3) Note. Lignin derivatives include those generally recovered from sulfite spent liquors of the wood-pulping industry, e.g., lignosulfonate, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13+, for compositions wherein the lignin is associated with a carbohydrate which contains some cellular structure, e.g., wood flour, hydrolyzed wood, etc.