US PATENT SUBCLASS 523 / 144
.~.~.~ Furan-type material

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ 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 {71}
139  DF  .~.~ Composition related to metal foundry molding or metallurgical furnace or process of preparing {6}
144.~.~.~ Furan-type material

DEFINITION

Classification: 523/144

Furan-type material:

(under subclass 139) Subject matter wherein the composition contains or reacts with a resin or monomer derived from a furan-type material.

(1) Note. Furan-type material is limited to furan or to derivatives containing a five-membered hetero ring having four carbon atoms and one oxygen atom and also having two double bonds within the hetero ring, e.g., furan, furfuryl alcohol, etc.