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Class Information
Number: 392/453
Name: Electric resistance heating devices > Heating devices (class 219 subclass 200) > Tank or container type liquid heater > Line connected tank > With immersion heating element > Removably insertable into tubular receptacle in tank
Description: Subject matter wherein the heating device may be placed into or removed from a tube shaped water-tight receiver extending into the tank.

Patents under this class:

Patent Number Title Of Patent Date Issued
8541721 Wake generating solid elements for joule heating or infrared heating Sep. 24, 2013
8515268 Boiler for heating water in coffee machines Aug. 20, 2013
8478116 Immersion heater with exhaust path for overpressure Jul. 2, 2013
8218955 Method and system for reducing response time in booster water heating applications Jul. 10, 2012
8106337 Modularly contained dual or multiple system water heating element assembly Jan. 31, 2012
8094998 Device for making a beverage, provided with a water boiler Jan. 10, 2012
7997236 Water heater and a method of operating same Aug. 16, 2011
7693402 Thermal storage unit and methods for using the same to heat a fluid Apr. 6, 2010
7570877 Electric water heater that keeps the hot water at a preset temperature constantly Aug. 4, 2009
7560672 Heated pump with boiling protection Jul. 14, 2009
7114468 Internal small volume storage water heater Oct. 3, 2006
6810206 Drain plug heater Oct. 26, 2004
6786182 Pressure control for household steam generator Sep. 7, 2004
6643454 Bath temperature maintenance heater Nov. 4, 2003
6418275 Supply device for use with a hydrogen source Jul. 9, 2002
6321036 Electric water heater Nov. 20, 2001
6054692 Heating device, heat storing type heat generating body and protective sheet for the heating device Apr. 25, 2000
5574822 Compact electric water heater Nov. 12, 1996
5553578 Washerless block heater Sep. 10, 1996
5386100 Control arrangement for immersion liquid heaters Jan. 31, 1995
5058195 Thermistor mounting arrangement Oct. 15, 1991
5021633 Engine block heater Jun. 4, 1991
5003999 Apparatus for treating silicon wafers in an acid bath Apr. 2, 1991
4978832 Pressurization of liquid carbon dioxide cylinder Dec. 18, 1990
4822980 PTC heater device Apr. 18, 1989
4658117 Food warmer with removable electric heater Apr. 14, 1987
4593178 Removable electric heating assembly for fluid heaters and boilers Jun. 3, 1986
4506140 Electric immersion heater assembly having an isolated terminal box Mar. 19, 1985
4375589 Diesel fuel tank having removable electric immersion heater assembly Mar. 1, 1983
4124793 Aquarium water heater Nov. 7, 1978
4039737 Electric immersion heating apparatus and methods of constructing and utilizing same Aug. 2, 1977
3983361 Electric heating apparatus for heating corrosive solutions Sep. 28, 1976

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