US PATENT SUBCLASS 427 / 450
.~ Inorganic carbon containing coating, not as steel (e.g., carbide, etc.)

Current as of: June, 1999
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427 /   HD   COATING PROCESSES

446  DF  SPRAY COATING UTILIZING FLAME OR PLASMA HEAT (E.G., FLAME SPRAYING, ETC.) {7}
450.~ Inorganic carbon containing coating, not as steel (e.g., carbide, etc.) {1}
451  DF  .~.~> Additionally containing nickel, cobalt, or iron as free metal or alloy

DEFINITION

Classification: 427/450

Inorganic carbon containing coating, not as steel (e.g., carbide, etc.):

(under subclass 446) Processes wherein the coating material, excluding steel, contains inorganic carbon.

(1) Note. Attention is directed to the definition of Class 260, Chemistry of Carbon Compounds, for the distinction between the term "organic" and "inorganic."

(2) Note. Metal compounds, excluding steel, containing more than 1.7 percent of inorganic carbon are properly classified in this subclass.

(3) Note. Plasma or flame spraying processes utilizing inorganic carbon containing material to form diamond-like films are found here.

SEE OR SEARCH CLASS

117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor,

79, for processes for growing therein-defined single-crystal of diamond and subclass 929 for the art collection of carbon single-crystal references. Class 423, subclass 446, is a mandatory search and cross-reference for patents directed to forming a free-standing single-crystal diamond even though properly placed in Class 117 as an original. 423, Chemistry of Inorganic Compounds,

446, for diamonds and methods of making, which does not result in a coated product.