Resources Contact Us Home
Browse by Category: Main > Household
Class Information
Number: 4/545
Name: Baths, closets, sinks, and spittoons > Tubs > With heating of tub structure
Description: Subject matter which includes means for heating the tub directly or through a heat exchange which may contain a liquid or air as the heat exchange medium.

Patents under this class:

Patent Number Title Of Patent Date Issued
8572769 Temperature conditioning of air about a spa vessel Nov. 5, 2013
8569663 Small-sized pool and PTC heater for internal liquid heating Oct. 29, 2013
8453275 Combination bathtub and spa Jun. 4, 2013
8406932 Spa control with improved heater management system Mar. 26, 2013
8392027 Spa control system with improved flow monitoring Mar. 5, 2013
8104532 Shower heat exchanger with clog-removable drain Jan. 31, 2012
7814584 Bathing apparatus Oct. 19, 2010
7490369 Illuminated bathtub and support system Feb. 17, 2009
7461416 Portable spa heater Dec. 9, 2008
7448095 Time tub Nov. 11, 2008
6943325 Water heater Sep. 13, 2005
6925661 Bathtub/shower water control system Aug. 9, 2005
6922856 Safety bathtub Aug. 2, 2005
6875961 Method and means for controlling electrical distribution Apr. 5, 2005
6581217 Directional air vents for spas and jetted bathtubs Jun. 24, 2003
6453487 Portable field sanitation unit Sep. 24, 2002
6317903 Bathtub design with therapeutical treatment devices Nov. 20, 2001
6303910 Method of making an injection molded paraffin bath and apparatus made thereby Oct. 16, 2001
6243889 Thermo-acoustic insulation system for sanitary device Jun. 12, 2001
6175970 Towel warming system for spa tub Jan. 23, 2001
6059965 Process and device to sterilize a stream of water May. 9, 2000
5930851 Hydro-thermo massaging tub and method of treatment Aug. 3, 1999
5884694 Bathroom dehumidifier method and apparatus Mar. 23, 1999
5794280 Spa apparatus with heat transferring hanging interior structural liner Aug. 18, 1998
5745934 Spa apparatus with hanging structural liner May. 5, 1998
5718007 Portable spa with easy access maintenance tray Feb. 17, 1998
5649330 Heated flexible bathing container Jul. 22, 1997
5345996 Energy saving water and air bubble heat maximizer for swimming pools, hot tubs, and spas Sep. 13, 1994
5345621 Method of insulating a spa using a flexible insulation blanket Sep. 13, 1994
5301745 Installation for heat recovery Apr. 12, 1994
5172754 Heat exchanger for recovery of heat from a spa or hot tub pump motor Dec. 22, 1992
5148858 Heat exchanger connected to a waste water discharge conduit Sep. 22, 1992
5143149 Wastewater heat recovery apparatus Sep. 1, 1992
5038853 Heat exchange assembly Aug. 13, 1991
4924069 Hot water supply for tubs May. 8, 1990
4903352 Fluid flow massaging apparatus Feb. 27, 1990
4821793 Tub and shower floor heat exchanger Apr. 18, 1989
4754502 Inflatable bath Jul. 5, 1988
4663613 Protective system for hot tub water and power supply May. 5, 1987
4455997 Heating unit for hot tubs and/or spa units Jun. 26, 1984
4409694 Electronic control device for liquids Oct. 18, 1983
4385724 Apparatus for controlling the water temperature of a spa May. 31, 1983
4291423 Heat reclamation for shower baths, sinks, and other fluid receiving vessels Sep. 29, 1981
4280234 Bath aid Jul. 28, 1981
4150665 Heater for hot tubs and storage tanks Apr. 24, 1979
4074370 Bathing apparatus for hospital or bedridden patients Feb. 21, 1978

  Recently Added Patents
Buried object detection in GPR images
Process for the production of an acylation catalyst
Molecular hydrogen stores and hydrogen transfer reagents for hydrogenation reactions
Data processor with virtual machine management
Device for maneuvering a vehicle using maneuvering moves using at least one trajectory
Handover signaling in wireless networks
  Randomly Featured Patents
Frangible article
Highly selective, highly uniform plasma etch process for spin-on glass
Edible pet chew
Wrist watch
Photographic film cassette, and apparatus and method of loading and removing photographic film in association with the cassette
Photosensitive mixture and photosensitive recording material produced therefrom with polymeric binder which is reaction product of (thio) phosphinic acidiso (thio) cyanate and active hydrogen
Carboxyl-terminal protein sequencing method and kit
Method for preparing a crosslinked graft copolymer of silicone and polyvinylpyrrolidone for use as a contact lens, and a contact lens produced thereby
Ventilator control system that generates, measures, compares, and corrects flow rates
Process for producing (E)-alkoxyimino or hydroxyiminoacetamide compounds and intermediates therefor