US PATENT SUBCLASS 524 / 445
.~.~.~.~.~.~ Clay, e.g., fullers earth, fire clay, etc.

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}
80  DF  .~.~.~ DNRM which is other than silicon dioxide, glass, titanium dioxide, water, halohydrocarbon, hydrocarbon, or elemental carbon {4}
442  DF  .~.~.~.~ Soil or inorganic silicon DNRM (other than silicon dioxide, glass, quartz, novaculite, or silicon dioxide type) {5}
444  DF  .~.~.~.~.~ Aluminum atom DNRM {4}
445.~.~.~.~.~.~ Clay, e.g., fullers earth, fire clay, etc. {2}
446  DF  .~.~.~.~.~.~.~> With water NRM
447  DF  .~.~.~.~.~.~.~> Kaolin or bentonite

DEFINITION

Classification: 524/445

Clay, e.g., fullers earth, fire clay, etc.:

(under subclass 444) Subject matter wherein the inorganic

silicon-aluminum nonreactant material is a clay.

(1) Note. Clays are aluminum silicate-bearing rocks which harden when fired and are plastic when wet. Included within the term clay are kaolin or china clay, ball clay, bentonite, fullers earth, dusting clay, calcined clays, fire clay, etc. For purposes of this subclass, a material will be considered a clay when it is named as such or is accepted in the art as a clay material.