US PATENT SUBCLASS 148 / 696
.~.~.~.~ Multiple working steps


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

Internet Version by PATENTEC © 1999      Terms of Use



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}
688  DF  .~.~ Aluminum(Al) or aluminum base alloy {5}
695  DF  .~.~.~ With working {1}
696.~.~.~.~ Multiple working steps {1}
697  DF  .~.~.~.~.~> With ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening


DEFINITION

Classification: 148/696

Multiple working steps:

(under subclass 695) Process which includes plural metal deforming steps and wherein each of said metal deforming steps are performed at from 400 deg.C down to 20 deg.C.

SEE OR SEARCH THIS CLASS, SUBCLASS:

577, for processes treating solid or semi-solid metal at temperatures below 20 deg.C.