US PATENT SUBCLASS 75 / 401
.~.~ Treating multicomponent metal-containing scrap having an integral substrate to separate metal therefrom by temperature modification or chemical process at least one metal remains solid during separation

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
401.~.~ Treating multicomponent metal-containing scrap having an integral substrate to separate metal therefrom by temperature modification or chemical process at least one metal remains solid during separation {2}
402  DF  .~.~.~> Utilizing molten salt bath
403  DF  .~.~.~> Removing nonmetal from metal

DEFINITION

Classification: 75/401

Treating multi-component metal-containing scrap having an integral substrate to separate metal therefrom by temperature modification or chemical process at 300 degrees C or greater wherein at least one metal remains solid during separation:

(under subclass 392) Process in which a multicomponent metal-containing scrap having an integral substrate is separated to recover metal. During the separation at least one metal remains solid. The separation is performed by changing the temperature of the scrap or by chemically processing the scrap at 300 degrees C or greater.

(1) Note. The following criteria will be used to define the word "scrap": (A) If a patent refers to a material as scrap, then the material will be assumed to be scrap. (B) If a patent does not refer to a material as scrap (e.g., metal borings, tin cans, etc.); but it can be inferred from the patent that metal, not a specific article, is recovered, then the material will be assumed to be scrap. (C) If it is unclear as to the nature of the material being treated (e.g., tin plate, etc.), the material will be assumed to be scrap. (D) If there is a positive statement indicating that an "article" is recovered, then the "article" is not "scrap" and the patent is classified elsewhere (e.g., removing metal compounds from engine parts, removing tin from a can to reuse the can, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

711+, for processes of recovering metal from multicomponent metal-containing scrap having an integral substrate in which

a nonmetallic material which is liquid under standard conditions is used.

SEE OR SEARCH CLASS

29, Metal Working,

403.1+, for separation of materials one from another in which the separation is done to salvage a portion of a specific article for reuse. 134, Cleaning and Liquid Contact With Solids, for processes of separating metal from metal or metal from nonmetal to clean a specific article for reuse (e.g., the cleaning of gun bores by the removal of metal fouling the same, etc.). If a base is cleaned and the removed metal is recovered, the original will go to Class 75 and a cross-reference will be placed in Class 134.

423, Chemistry of Inorganic Compounds,

90+, for detinning in which a Tin (Sn) compound is produced.

521, Synthetic Resins or Natural Rubbers,

40+, for processes of treating scrap or waste product containing solid organic polymer to recover a solid polymer therefrom.