US PATENT SUBCLASS 527 / 501
.~.~ With polyepoxide reactant or N=C=X reactant wherein X is chalcogen

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}
500  DF  .~ FROM COAL OR BITUMINOUS MATERIAL, EXTRACT OR DERIVATIVE THEREOF, OR FATTY STILL RESIDUE REACTANT {2}
501.~.~ With polyepoxide reactant or N=C=X reactant wherein X is chalcogen

DEFINITION

Classification: 527/501

With polyepoxide reactant; or with N=C=X reactant wherein X is chalcogen:

(under subclass 500) Subject matter wherein a polyepoxide reactant or N=C=X reactant is additionally present.

(1) Note. X is chalcogen (O, S, Se, Te).

SEE OR SEARCH CLASS

525, Synthetic Resins or Natural Rubbers,

54.5, for the chemical combination of a solid polyepoxide resin with coal, bituminous material, extract, or derivative thereof or fatty still residue.