US PATENT SUBCLASS 428 / 633
.~.~.~.~ Plural oxides

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

544  DF  ALL METAL OR WITH ADJACENT METALS {31}
615  DF  .~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, joint, etc.) {15}
621  DF  .~.~ With additional, spatially distinct nonmetal component {7}
632  DF  .~.~.~ Oxide-containing component {1}
633.~.~.~.~ Plural oxides

DEFINITION

Classification: 428/633

(under subclass 632) Subject matter in which the oxide is of more than one metal or consists of two or more oxides.

(1) Note. A patent claiming a nonmetal component merely as "a ceramic" is placed here. Where the ceramic is claimed in terms only of a single oxide constituent, e.g., "a high-alumina ceramic", the patent is placed in subclass 632, or 629, if appropriate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

636+, for a metallic composite having a vitrified ceramic component.