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Class Information
Number: 4/318
Name: Baths, closets, sinks, and spittoons > Flush closet > With recirculating means > Including specified filtering means
Description: Subject matter wherein the filter is a particularly described means to remove or separate solid particles, impurities, etc., from a liquid by passing it through a porous substance.

Patents under this class:

Patent Number Title Of Patent Date Issued
7155750 Filtering apparatus of circulating flush toilet Jan. 2, 2007
7111332 Waterless urinals which can be flushed Sep. 26, 2006
7014778 Device and method for treating waste product Mar. 21, 2006
6523186 Toilet water recycling system Feb. 25, 2003
6519787 Toilet water recycling system Feb. 18, 2003
6412121 Thermo-evaporation type toilet system Jul. 2, 2002
6178566 Transportable waste collection and treatment toilet system Jan. 30, 2001
5500960 Flush system for outdoor portable toilets Mar. 26, 1996
5080797 Method of disposing of fecal matter from toilet systems in fast moving vehicles Jan. 14, 1992
5068926 Flush toilet Dec. 3, 1991
5045188 Recirculating toilet water system with self-purging valve operable by a restoring spring Sep. 3, 1991
4973402 Flow restrictor and strainer assembly for a toilet tank fill valve and the like Nov. 27, 1990
4672690 Vacuum tank construction for self-contained sewage handling apparatus Jun. 16, 1987
4585562 Self-contained sewage waste disposal system Apr. 29, 1986
4547917 Water closet system having a liquid separator Oct. 22, 1985
4519103 Self-contained sewage waste disposal system May. 28, 1985
4433443 Self-contained flow through sewage waste disposal system Feb. 28, 1984
4393524 Self-contained sewage waste disposal system Jul. 19, 1983
4359789 Sewerless disposal system Nov. 23, 1982
4313233 Waterless flush toilet system Feb. 2, 1982
4271539 Quick-change toilet system Jun. 9, 1981
4246665 Non-polluting toilet system Jan. 27, 1981
4222130 Waterless flush toilet system Sep. 16, 1980
4213864 Combination of a biological dry toilet and a biological waste water purifying plant Jul. 22, 1980
4197597 Water recycling with solids and foam removal Apr. 15, 1980
4162549 Filtering elements Jul. 31, 1979
4115879 Water recirculation system Sep. 26, 1978
4070714 Sewerless recirculating toilet and human waste storage system Jan. 31, 1978
4040956 Synthetic flush fluids Aug. 9, 1977
RE29297 Chemical closets Jul. 12, 1977
4014767 Self-contained waste disposal system including self-cleaning filter Mar. 29, 1977
3950249 Sanitary waste treatment plant Apr. 13, 1976

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