US PATENT SUBCLASS 523 / 159
.~.~.~.~ Containing asbestos and at least one inorganic 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}
149  DF  .~.~ Friction element composition or process of preparing {2}
152  DF  .~.~.~ For wheeled vehicle {4}
159.~.~.~.~ Containing asbestos and at least one inorganic material

DEFINITION

Classification: 523/159

Containing asbestos and at least one inorganic material:

(under subclass 152) Subject matter wherein the composition contains asbestos and at least one other inorganic nonreactive material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152, for placement of patents in this subclass and its indents, the classification should be based upon the specification along with the claims. Thus, the specification and the claims should be read to determine if asbestos or an organic or inorganic material is present or absent. A patent which does not claim asbestos but wherein the disclosure is limited to asbestos would be originally classified into an asbestos containing subclass.