US PATENT SUBCLASS 148 / 562
.~.~ Treating single crystal

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

95  DF  PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17}
559  DF  .~ Heating or cooling of solid metal {22}
562.~.~ Treating single crystal

DEFINITION

Classification: 148/562

Treating single crystal:

(under subclass 559) Process wherein a single crystal metal or metal alloy is the material being treated.

SEE OR SEARCH CLASS

117, Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor, for processes and non-coating apparatus for growing therein-defined single-crystal of all types of materials, including metal, alloy, or intermetallic single-crystal (except those proper for Class 164,

122.2, ). Class 117 is proper for metal, alloy, or intermetallic single-crystal growing in any physical state, including solid phase recrystallization. Class 117 is proper for metal, alloy, or intermetallic single-crystal growing and such combined with perfecting operations for the growing step, except that Class 148 provides for single-crystal growing combined with a subsequent step of heat treatment (which herein includes controlled cooling) when the purpose of the heat treatment (or controlled cooling) is to modify the internal physical structure or chemical property of a metal, alloy, or intermetallic material. When the subsequent heat treatment (or controlled cooling) merely operates on the single-crystallinity, such as stress or strain annealing or to remove point defects, the combined process is proper for Class 117; when the subsequent heat treatment (or controlled cooling) operates to effect significant metal, alloy, or intermetallic material heat treatment (or controlled cooling) purposes, such as solutionizing, homogenizing, or

precipitation hardening, then the combined process is proper for Class 148. Class 117 provides for simultaneous or prior perfecting operations combined with single-crystal growing. See Class 117 definition, section C, (4) Note, for discussion of perfecting operations.