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| Number | Title | Issue Date |
| 7300575 | Portable filter system A filter system for receiving an aqueous-based fluid contaminated with particles and emulsified contaminant oil, removing the particles, and separating the emulsified contaminant oil from the aqueous-based fluid includes a filter media for receiving the aqueous-base... | 11/27/2007 |
| 6920650 | Portable outdoor toilet with advertising indicia A portable outdoor toilet (10) with advertising indicia including a platform (12) having a generally circular configuration. A base (18) is positioned atop the platform (12). The base (18) has a generally circular configuration. A ... | 07/26/2005 |
| 6258215 | System and a rotary vacuum distiller for water recovery from aqueous solutions, preferably from urine aboard spacecraft The system for the recovery of water from urine aboard spacecraft includes a urine intake and pretreatment unit, a unit for water reclamation from urine and a condensate purification unit. The unit for water reclamation from urine is made on the basis of ... | 07/10/2001 |
| 6081939 | Portable toilet A portable toilet comprising a cabana in which a tank is installed to contain liquid and solid waste and a conditioning liquid for said waste, said tank having, in a substantially central position, a port around which an annular seat is provided. Inside t... | 07/04/2000 |
| 5682622 | Portable stand-alone restroom facility with handicap access A multi-sided portable cabana that exhibits increased structural integrity and added dimensional qualities when compared to conventional cabanas, and that is also accessible to persons having physical disabilities. The cabana includes a generally flat, pl... | 11/04/1997 |
| 5566401 | Cleaning mechanism of a stool Raw sewage, toilet paper or foreign matter is prevented from being stuck to an inner bowl of a stool by air bubbles. A cleaning mechanism of the stool comprises an outer cover which has an upper opening and can store cleaning liquid therein, an inner bowl... | 10/22/1996 |
| 5088134 | Portable non-flushing toilet A portable toilet device has a disposable waste receiving bag situated therein. The device is operable from an open or in-use position to a closed or non-use position which causes rotation of the waste receiving bag to temporarily close or seal the bag.... | 02/18/1992 |
| 4979242 | Collapsible room shelter A collapsible portable shelter or changing room comprising a body of circular bellows like configuration capable of manufacture on current plastic mold equipment with current plastic materials. The bellows like walls overlap vertically and integrally down... | 12/25/1990 |
| 4974265 | Collapsible privacy shelter A multi-purpose shelter adapted for use as a toilet, shower or changing enclosure of such size as to accommodate a person, has in a sectional embodiment a floor with ventilation and drainage slots surrounded by a cylindrical truncated shell containing a p... | 12/04/1990 |
| 4712255 | Portable toilet with valve actuating handle that automatically locks the valve in closed position during emptying of the holding tank A portable toilet with a movable spout via which accumulated waste contents are dumped at a suitable sanitary disposal station. The portable toilet has separably mounted seat and holding tank sections which are separated for dumping. The spout is rotatabl... | 12/15/1987 |
| 4641383 | Portable toilet holding tank spout A portable toilet comprises a spout via which accumulated waste contents are dumped at a suitable sanitary disposal station. The disclosed embodiment of portable toilet comprises separably mounted seat and holding tank sections which cooperatively define ... | 02/10/1987 |
| 4581780 | Precast concrete toilet with vent An outdoor toilet constructed of precast concrete having integral color incorporated therein with the external surfaces being simulative of wood or the like and provided with a vault with a vent stack extending upwardly along one wall of the toilet and co... | 04/15/1986 |
| 4493118 | Collapsible toilet shelter A shelter adapted for use as a portable toilet having a plurality of upstanding planar wall panels connected along adjacent vertical sides by flexible sheet hinge members. The wall panels, foldably collapsible for ease of shipment, are combined with a rem... | 01/15/1985 |
| 4305164 | Portable toilet facility A knock-down portable toilet facility that has components made of thermoplastic material and which can be shipped in a disassembled state, and which can be erected at a site of intended use by interconnecting the components.... | 12/15/1981 |
| 4285077 | Apparatus for extracting proteins from urine Pharmaceutically useful trace elements contained in human urine are collected by disposing a filter body containing an adsorbent for the trace elements in the gravity flow line connecting the unflushed urinal of a portable toilet to its holding tank. The ... | 08/25/1981 |
| 4268925 | Sewage treatment system A self-contained, closed system, aerobic sewage treatment system designed for use in a house or in mobile situations such as a boat, plane, bus, train, etc. comprising a housing with a toilet and a main digestion tank and a series of secondary digestion t... | 05/26/1981 |
| 4114203 | Water closet tank drain valve A self-contained, recirculating flush liquid, type of water closet for passenger aircraft; wherein, the means for periodically draining the contents of the waste holding tank, comprises an inverted U-shaped tube which is separated at the bend of the U-sha... | 09/19/1978 |
