US PATENT SUBCLASS 524 / 448
.~.~.~.~.~.~ Diatomite or diatomaceous earth, e.g., kieselguhr, infusorial earth, 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}
448.~.~.~.~.~.~ Diatomite or diatomaceous earth, e.g., kieselguhr, infusorial earth, etc.

DEFINITION

Classification: 524/448

Diatomite or diatomaceous earth, e.g., kieselguhr, infusorial earth, etc.:

(under subclass 444) Subject matter wherein the silicon-aluminum nonreactant material is diatomite or diatomaceous earth.

(1) Note. Diatomite or diatomaceous earth is a soft earthy rock composed of the siliceous skeletons of small aquatic plants called diatoms. Included within the term are kieselguhr, siliceous earth, tripolite, and infusorial earth.