US PATENT SUBCLASS 148 / 538
.~ With casting or solidifying from melt

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}
538.~ With casting or solidifying from melt {6}
539  DF  .~.~> Centrifugal casting
540  DF  .~.~> Iron(Fe) or iron base alloy {5}
549  DF  .~.~> Aluminum(Al) or aluminum base alloy {3}
553  DF  .~.~> Copper(Cu) or copper base alloy {1}
555  DF  .~.~> Nickel(Ni) or nickel base alloy {1}
557  DF  .~.~> With working

DEFINITION

Classification: 148/538

With casting or solidifying from melt:

(under subclass 95) Process which includes a step of casting metal or solidifying a total metal mass (i.e., not just a portion or coating) from a melted condition.

(1) Note. Class 148 will take all processes of casting and significant heating with working or casting and heating wherein a change in microstructure occurs during a post-casting operation. In Class 148, both electrical and nonelectrical heating is acceptable. See the notes under the Class 148 definition to determine what constitutes significant heating for distinguishing over the other metal working and heating classes.

(2) Note. Treating of a cast or solidified metal starting material without an actual recitation of the casting or solidifying step is improper for this subclass and the subclasses indented hereinunder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

221, for processes of casting combined with carburizing or nitriding.

512, for processes of treating metal by melting only the surface thereof.

522+, for processes of producing or treating layered, bonded, welded or mechanically engaged article or stock as a final product when combined with a casting operation.

SEE OR SEARCH CLASS 29, Metal Working, appropriate subclasses for a process combining casting and working of metal.

164, Metal Founding, appropriate subclasses for a process of casting, per se, of metal.

219, Electric Heating, appropriate subclasses for processes of casting, per se, or casting and working involving nonsignificant heat treating using electrical heating.