US PATENT SUBCLASS 75 / 10.11
.~.~ With zone melting or fractional crystallization

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

Internet Version by PATENTEC © 1999      Terms of Use


75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
10.1  DF  .~ Electrothermic processes (e.g., microwave, induction, resistance, electric arc, plasma, etc.) {17}
10.11.~.~ With zone melting or fractional crystallization

DEFINITION

Classification: 75/10.11

With zone melting or fractional crystallization:

(under subclass 10.1) Processes wherein solid metal is traversed by a melt zone causing migration of impurities within the metal resulting in purification of the metal (i.e., zone melting) or processes of refining molten metal or metal alloys by selective crystallization and separation of the crystalline phase from the melt to effect purification (i.e., fractional crystallization).

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; e.g., by zone melt processing. References disclosing processes which form Class 117 defined single-crystal material and also form an amorphous material and/or a polycrystalline material should be placed according to the following guidelines: placement should be determined first by the most comprehensive claim; if that is not determinative

placement should be determined as follows: (a) references having only generic claims should have the original placed in Class 117 with appropriate cross-reference, (b) references having all species claims placeable in one class should have the original placed in that class with appropriate cross-reference, or (c) references having equally comprehensive species claims should have the original placed in Class 117 with appropriate cross-reference.