US PATENT SUBCLASS 219 / 440
.~.~.~ With pressure generating or maintaining means (e.g., pressure cooker)

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

Internet Version by PATENTEC © 1999      Terms of Use


219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
438  DF  .~.~ With vessel {3}
440.~.~.~ With pressure generating or maintaining means (e.g., pressure cooker)

DEFINITION

Classification: 219/440

(under subclass 438) Subject matter including means whereby the internal pressure within the vessel is maintained between predetermined limits or whereby a pressure in excess of normal atmospheric pressure is generated as a result of the action of the heating unit or units.

SEE OR SEARCH THIS CLASS, SUBCLASS:

431, for combined vessel and stand wherein the vessel is of the pressure maintaining type.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers, appropriate subclasses for high pressure steam generators.

126, Stoves and Furnaces,

348, for steam generators and cookers.