US PATENT SUBCLASS 527 / 400
.~ FROM LIGNIN, TANNIN, OR DERIVATIVE REACTANT

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {6}
400.~ FROM LIGNIN, TANNIN, OR DERIVATIVE REACTANT {2}
401  DF  .~.~> With N=C=X reactant wherein X is chalcogen or polyepoxide reactant
403  DF  .~.~> With phenolic reactant

DEFINITION

Classification: 527/400

FROM LIGNIN, TANNIN, OR DERIVATIVE REACTANT:

(under subclass 1) Subject matter under Class 520, ... wherein a solid polymer is derived from lignin, tannin, or a derivative as a reactant and an ethylenic monomer, SPFI, or SICP; or process of preparing said polymer.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, for a definition of the term "heterocyclic".

560, Organic Compounds,

68, for a definition of "tannin and derivative thereof".