US PATENT SUBCLASS 423 / 328.2
.~.~.~.~.~ Crystalline

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

324  DF  SILICON OR COMPOUND THEREOF {4}
325  DF  .~ Oxygen containing {2}
326  DF  .~.~ Metal containing (i.e., silicate) {3}
327.1  DF  .~.~.~ Aluminum containing {2}
328.1  DF  .~.~.~.~ Aluminosilicate {3}
328.2.~.~.~.~.~ Crystalline {1}
328.3  DF  .~.~.~.~.~.~> Mica

DEFINITION

Classification: 423/328.2

Crystalline:

(under subclass 328.1) Products and processes in which the products have geometrically arranged plane faces or surfaces and a symmetrical internal structure (e.g., pillared or phyllosilicates).

(1) Note. Crystalline aluminosilicates, such as sorbents, are to be considered products for Class 423, unless mixed with an additive whose function is not solely to perfect the product. See (6) Note to the definition of subclass 265.

(2) Note. Three dimension crystalline structural products that are zeolites are excluded from this subclass. See (2) Note to the definition of subclass 700.

SEE OR SEARCH THIS CLASS, SUBCLASS:

700, for products and processes wherein the product is a zeolite.

SEE OR SEARCH CLASS

501, Compositions: Ceramic, 141+, for ceramic compositions and processes for producing such.