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Class Information
Number: 4/218
Name: Baths, closets, sinks, and spittoons > Ventilation > Roof outlet
Description: The structure of the roof connection with the vent pipe.










Patents under this class:

Patent Number Title Of Patent Date Issued
8434170 Toilet ventilation system May. 7, 2013
8273162 Wastewater plumbing vent gas adsorption filter Sep. 25, 2012
6959457 Roof vent ingress prevention device Nov. 1, 2005
6954947 Pluming vent cover Oct. 18, 2005
6786815 Apparatus for venting rooms with exhaust fans Sep. 7, 2004
6735790 Vent stack screen for portable toilet holding tanks May. 18, 2004
6431972 Multiple plumbing vent apparatus Aug. 13, 2002
6374425 Sewer system ventilation cap Apr. 23, 2002
6363542 Toilet ventilator Apr. 2, 2002
6202226 Portable waste odor collection apparatus Mar. 20, 2001
6122870 Stack ban Sep. 26, 2000
5890960 Venting system for structures using a ridge vent Apr. 6, 1999
5671484 Toilet ventilator apparatus Sep. 30, 1997
5630233 Vehicle toilet vent apparatus May. 20, 1997
5299327 Sewer ventilator system for recreational vehicles, boats and the like Apr. 5, 1994
5299326 Vehicle toilet vent apparatus Apr. 5, 1994
5214266 Electric heating rod attachment insertable into roof exhaust end of sewer vent pipe to prevent clogging from ice or snow accumulation May. 25, 1993
4993083 Ventilated toilet Feb. 19, 1991
4974632 Automatic air valves for ducts Dec. 4, 1990
4922557 Outdoor toilet holding tank ventilation system May. 8, 1990
4901715 Apparatus and method for breathing through the soil-stack during a high-rise fire Feb. 20, 1990
4524262 Electrically heated sewer vent line defroster Jun. 18, 1985
4232406 Water closet ventilating system with vacuum breaker valve Nov. 11, 1980
4200940 Toilet seat volatile gas incinerator May. 6, 1980
4165544 Odorless toilet stool Aug. 28, 1979
4007498 Toilet ventilator including overflow-responsive sensor Feb. 15, 1977
3938201 Ventilator for a toilet bowl Feb. 17, 1976











 
 
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