US PATENT SUBCLASS 148 / 27
.~ Heat treating
Current as of: June, 1999
Click HD for Main Headings
Click for All Classes
DEFINITION
Classification: 148/27
Compositions for treating solid metal when in a heated condition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
13.1+, for heat treatment processes utilizing special compositions.
27+, for heat treating compositions applied to the surface of the metal work in the nature of a granular deposit or coating.
SEE OR SEARCH CLASS
252, Compositions, for heat exchange and related compositions, per se. This and indented subclasses of Class 148 provide for patents directed to metal heat treating compositions where, in addition to the heat exchange function the composition, or any of its constituents, reacts chemically, with the metal or any of its alloy constituents to form coatings, metal compounds, etc., or to case harden the work.
