Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7438808 | Sand catcher The invention relates to a sand catcher comprising a deposition chamber (1) that is configured as a steel container with a cylindrical cross-section, traversed in a longitudinal direction. Said deposition chamber comprises air-supply nozzles (4) on one... | 10/21/2008 |
| 7381323 | Filtration apparatus A filtration apparatus is provided which is easy to maintain, manage and which enables preservation of filtration characteristics due to the fact that filtration is carried out by use of a gelatinous filter apparatus. In the filtration apparatus, filtration characte... | 06/03/2008 |
| 7303085 | Method and apparatus for purifying mixtures of oil and water An apparatus and method for separating oil and particulate contaminants from pump-driven aqueous fluid contaminated with emulsified oils, free oils, particulate matter, suspended solids, and other contaminants in which the contaminated fluids are introduced into a c... | 12/04/2007 |
| 7175768 | Method and device for clarification of liquids, particularly water, loaded with material in suspension A method is disclosed for clarifying, by flotation, waters contaminated with suspended matter, wherein the clarification treatment takes place in two successive steps implemented in a single installation. The method principally involves flowing contaminated water th... | 02/13/2007 |
| 7122118 | Apparatus for treatment of contaminated liquids A treatment vessel for separating contaminants from a base liquid is provided. The vessel comprises a first cylindrical portion, a frusto-conical portion, a second cylindrical portion and a conical portion, the conical portion having a bottom outlet arranged to disc... | 10/17/2006 |
| 7067065 | Vortex grit collector with mechanical conveyor for grit removal A grit removal device, as may be used in a water or wastewater treatment plant, has a vortex grit collector and a mechanical conveyor for removing the grit from the collector. The grit collector includes a tank having an influent channel and an effluent channel, and... | 06/27/2006 |
| 7044308 | Apparatus for the removal of suspended solids and entrained oil from an aqueous solution An apparatus for the removal of suspended solids and entrained oil from an aqueous solution is disclosed. The apparatus comprises a vessel having a top, bottom, side walls and end walls, with a flow inlet aperture at an upstream end and a flow outlet aperture at a d... | 05/16/2006 |
| 7029585 | Grease trap The grease trap is a device that may be attached to the drainpipe of a sink and the outlet pipe of a plumbing system to remove grease from wastewater before it enters the plumbing system. The device uses simple principles of gravity and separation of immiscible liqu... | 04/18/2006 |
| 6960294 | Apparatus for the separation of solids from liquids by dissolved gas floatation The present invention relates to methods and apparatus for separation of solids from liquids and separation of liquids from liquids (such as oil from water) by dissolved gas floatation. A dissolved gas floatation clarifier is described as is a liquid-gas mixer, a li... | 11/01/2005 |
| 6953527 | Fuel tank with water trap A fuel tank for use with small internal combustion engines, the fuel tank having an inlet and an outlet and storing a quantity of fuel therein. A hydrophobic barrier is positioned within the fuel tank in flow communication with the outlet, and permits the passage of... | 10/11/2005 |
| 6866778 | Tank for draining a granular material/liquid mixture A drainage tank for granular material/liquid mixture includes a low part and a high part provided with a lid. A device for separating the liquid and the granular material is arranged in the low part. A device for evacuating excess liquid is arranged in the high part... | 03/15/2005 |
| 6645387 | Separator device A method and device for separating grease from waste water. The separator device includes a receptacle with an upper first part and a lower second part separated by a plate. The receptacle further has an inlet port for waste water, a discharge port for se... | 11/11/2003 |
| 6638424 | Stormwater treatment apparatus A liquid purification and separation apparatus for separation of pollutants in stormwater runoff is disclosed. This apparatus utilizes gravitational separation and tortuosity, resulting from a plurality of baffles both perpendicular to and oblique to the ... | 10/28/2003 |
| 6568541 | Tortuous path filter A settling tank for clarifying washing fluids with one or more walls disposed within the tank, each wall having a plurality of passages and defining a settling chamber. Preferably there is a top mounted fluid runoff opening into the tank disposed above th... | 05/27/2003 |
| 6554141 | Device for floccing a mixture produced during oil or gas well drilling A device for floccing a mixture produced during oil or gas well drilling has a vertical tank with a vertical peripheral wall having a central axis, and a bottom located in a lower end of the peripheral wall, the tank having a height which is significantly... | 04/29/2003 |
| 6527960 | Jet pump treatment of heavy oil production sand A process for separating oily films from sand particles carried in a solvent free water stream includes the use of a jet pump scrubber in a density classification tank to treat such oily coated particles at controlled operating temperatures above 65° C. ... | 03/04/2003 |
| 6406630 | Curtain assembly for waste treatment A waste treatment apparatus (10) including one or more vertically oriented curtains (11) each formed of mesh material having a minimal aperture size of 0.001 mm, means for applying liquid waste to said curtain(s) located above said curtain (17, 15) and co... | 06/18/2002 |
| 6328882 | Residential waste water recycling system A system for recycling waste water from showers, bath tubs and lavatories to provide flush water for toilets and urinals. The system includes a receiving tank A, an overflow conduit 4, a make-up water conduit 16, a pump B, and a hydro-pneumatic tank C. Th... | 12/11/2001 |
| 6261462 | Combination pump and separator, especially for commercial kitchens An apparatus for separating an immiscible or insoluble fluid mixture into its components, namely, a less-dense component and a denser component, is described. The apparatus may be used in commercial kitchens to separate grease-oil/water mixtures into a gr... | 07/17/2001 |
| 6132609 | Combination water filter tank A combination water filter tank, which includes a rectangular housing, three transverse partition boards disposed in the housing and defining a first sedimentation chamber, a second sedimentation chamber, a third sedimentation chamber and a fourth sedimen... | 10/17/2000 |
| 5935427 | System for draining a liquid storage tank The present invention relates to a system which makes it possible to remove undesirable liquids, generally an aqueous phase, which precipitate to the bottom of tanks for storing liquid products. Use is made of a drainage device (30) which comprises a conc... | 08/10/1999 |
| 5876598 | Water purification decant assembly An improved modular system of solids separation is described. In the invention, a settling tank is provided which consists of one or more hoppers having sloped sides downwardly to a drain. Liquids with entrained solids are permitted to accumulate within t... | 03/02/1999 |
| 5830355 | Linear solids removal unit The present invention provides an improved solids removal and concentrating unit. The solids removal and concentrating unit comprises a tank, an inlet line, an outlet line, and a sludge removal line communicating with the tank. The solids removal unit fur... | 11/03/1998 |
| 5779917 | Process for separating fluids having different densities A process of and device for separating fluids of different densities involving transporting the fluid mass from a turbulent flow region and into a laminar flow region and then into a further separation area having a geometry sufficient to provide for the ... | 07/14/1998 |
| 5700378 | Method and apparatus for gravitational separation of fine articles from a liquid The invention relates to a method and an apparatus for the gravitational separation of fine particles out of a liquid. The liquid containing the particles which are to be separated is conducted with laminar flow through the gaps between a plurality of clo... | 12/23/1997 |
| 5670039 | Linear solids removal unit The present invention provides an improved solids removal and concentrating unit. The solids removal and concentrating unit comprises a tank, an inlet line, an outlet line, and a sludge removal line communicating with the tank. The solids removal unit fur... | 09/23/1997 |
| 5651896 | Sulfur separation system with interface control A liquid separator system for separating molten sulfur from liquid redox solution or reslurry water. The system includes a vessel with a top part and a bottom part. The vessel has a larger diameter at the top part than at the bottom part, and the cross se... | 07/29/1997 |
| 5637234 | Apparatus and method for separating fluids having different specific gravities, such as oil and water An apparatus and method for separating a mixture of fluids having different specific gravities, such as oil and water. The method comprises separating the mixture into multiple streams and discharging the multiple streams into a vessel below the surface o... | 06/10/1997 |
| 5601706 | Sewage treatment apparatus including aggregate separator An apparatus for treating of sewage or waste water comprises an aggregate separator (30, 32, 34). The apparatus includes a waste water reservoir (12), a device (22) for circulating the waste water (16) in the reservoir (12), and a replenishing chamber (38... | 02/11/1997 |
| 5584993 | Settling unit with plate separator A settling unit for separating a liquid and the particles. Such as sand, suspended therein, comprises a basin with an inlet for the liquid mixture containing the particles, and an overflow for discharging the liquid after at least some of the particles ha... | 12/17/1996 |
| 5547569 | Multiple stage water clarifier A sloped plate water clarifier is provided with multiple clarifying stages. Slurry enters a feeding and mixing passageway that contains chemical flocculant in the form of polymer gel logs. Agitating drums in the passageway provide controlled mixing of the... | 08/20/1996 |
| 5518617 | Gravity clarifier A separator for separating contaminants from a base liquid. The separator includes a roof arrangement, part of which extends downwardly and radially inwardly into the liquid in the separator. The roof arrangement is generally in inverted conical form. The... | 05/21/1996 |
| 5492620 | Apparatus for removing contaminants from a waste stream This invention includes a first balance pH tank, a clarifier tank and a final pH balance tank. The first tank periodically receives a certain volume of the waste stream. This tank is equipped with an automatic system for raising the pH so that all the hea... | 02/20/1996 |
| 5478478 | Apparatus and method for preventing vortexing of a liquid in a separatory funnel The present invention relates to a separatory funnel for preventing vortexing of liquid and identifying an interface between immiscible liquids, said separatory funnel having a baffle plate completely covering the space directly above the outlet opening o... | 12/26/1995 |
| 5453197 | Fuel-water contaminant separator A fuel separator designed to separate water and contaminants out of fuel being used in internal combustion engines. Contaminated fuel enters the separator body by inlet port located in the upper portion of the separator body. Having a top, a conical botto... | 09/26/1995 |
| 5445730 | Grease/oil/water separator device for vehicle wash system A grease/oil/water separator device and assembly for a vehicle wash system having a grease/oil/water separator tank which has three tank compartments. A first tank, a settling tank, is provided with entrance and exit piping such that a diagonal cross-flow... | 08/29/1995 |
| 5435914 | Clarifying arrangement for waste water A clarifying device for waste water has a plurality of containers for receiving waste water, and a device for aerating or gasifying waste water in at least one of the containers. The containers are formed as treatment cells which are combinable with one a... | 07/25/1995 |
| 5368747 | Fluid separation system and method Improved techniques are provided for separating mixtures of materials having different densities. The apparatus of the present invention is well suited for separating oil from water, and includes a separation tank defining a cylindrical water inlet chambe... | 11/29/1994 |
| 5336402 | Sewage treatment apparatus Disclosed is a sewage treatment apparatus formed of an aeration chamber; and a settling chamber, into which aerated water is introduced from the aeration chamber for sedimentation of sludges. In this apparatus, the settling chamber is disposed upwardly of... | 08/09/1994 |
| 5220825 | Apparatus for collecting particulate samples Multi-chamber devices of collecting particles in aquatic environments including an upper chamber serving as a particle interceptor chamber, a lower chamber serving as a particle accumulator chamber, and a valve assembly interposed between the upper and lo... | 06/22/1993 |
