US PATENT SUBCLASS 501 / 94
.~ Refractory

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
94.~ Refractory {8}
95.1  DF  .~.~> Fiber or fiber containing {1}
96.1  DF  .~.~> Boride, silicide, nitride, oxynitride, carbonitride, or oxycarbonitride containing {7}
99  DF  .~.~> Elemental carbon containing {2}
102  DF  .~.~> Zirconium compound containing {2}
108  DF  .~.~> Magnesium compound containing {7}
123  DF  .~.~> Alkaline earth metal compound containing {2}
126  DF  .~.~> Trivalent metal compound (e.g., iron oxide, chromium oxide, trivalent rare earth oxide, etc.) containing {2}
133  DF  .~.~> Silica containing

DEFINITION

Classification: 501/94

Refractory:

(under subclass 1) Subject matter directed to refractory compositions and processes for their preparation.

(1) Note. See the Glossary in the class definition of this class for the definition of the term "refractory".

(2) Note. Among the art terms used to describe materials classified herein are: refractories, heat resistant materials, or linings, furnace linings, firebrick, pyroceramic cones, kiln brick, kiln linings, kiln furniture, and saggers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

87+, for ceramic refractory compositions which contain a carbide or oxycarbide.

SEE OR SEARCH CLASS

51, Abrasive Tool Making Process, Material, or Composition,

307, for the use of inorganic material which may contain a ceramic composition being used as an abrasive material within the class definition. 52, Static Structures (e.g., Buildings),

596, for building blocks with significant structural features

which may comprise a refractory composition.

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,

301, for furnace linings which contain chemicals having a refining effect on molten metal.

373, Electric Furnaces,

71+, and 137 for electric furnace linings, per se, defined structurally.

451, Abrading,

28, for the use of an abrading material which may contain a ceramic composition being used in an abrading process under the class definition.

508, Solid Antifriction Devices, Materials Therefor, Lubricant and Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions, for lubricant compositions which may contain a refractory abrasive ingredient.

510, Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions, appropriate subclasses for cleaning compositions comprising an abrasive or scouring component which may include a refractory material.