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 |
| 8038874 | Treatment system A treatment system comprising a holding tank for a source liquid, a pump having a pump inlet for the intake of source liquid and a pump discharge, at least one conduit connected to the pump discharge and a liquid dispenser connected to the one conduit, the dispenser... | 10/18/2011 |
| 7927481 | System for the recovery of washing liquids used in showers, wash basins and/or baths System for the recovery of washing liquids used in showers, wash basins, and/or baths, including a first decantation tank provided with at least one inlet connected to a downflow point of washing water, a second collection tank, an overflow partition wall adapted to... | 04/19/2011 |
| 7879230 | Vacuum-actuated liquid disinfectant dispenser and system A vacuum-actuated liquid chlorine dispenser for use in an aerobic treatment system. Effluent is diverted from a discharge pipe in an aerobic treatment system into an inlet of a venturi chamber. The resulting pressure differential resulting from effluent flowing thro... | 02/01/2011 |
| 7875170 | Treatment system A treatment system comprising a holding tank for a source liquid, a pump having a pump inlet for the intake of source liquid and a pump discharge, at least one conduit connected to the pump discharge and a liquid dispenser connected to the one conduit, the dispenser... | 01/25/2011 |
| 7632399 | Fluid treatment system and method A fluid treatment system, includes a pressurizable tank, a compressed air source, and a float disposed inside the tank, the float rising or falling in response to a level of fluid in the tank; and a float-actuated switch assembly connected to the float. The float-ac... | 12/15/2009 |
| 7347933 | Self-cleaning intake screen A self-cleaning screen that automatically cleans both the inside and outside surfaces of the cylindrical screen using only the rotation of the cylindrical screen itself. This self-cleaning ability is accomplished by using a fixed brush on the exterior surface of the... | 03/25/2008 |
| 7300583 | Apparatus and method for remediation of a waste stream The present invention provides a dispensing apparatus and method for the delivery of remediation agents into waste systems wherein the apparatus is capable of generating and maintaining a controlled release of concentrated a remediation composition throughout the de... | 11/27/2007 |
| 7276169 | Method for filtering water in an aquarium, a water cultivation tank and similar water bonds, and corresponding filtering system A method for filtering the water of an aquarium, a water cultivation tank or similar water bonds, by means of a filtering system comprising a closed vessel and defining a chamber, a filtering body housed in the chamber, a circulation pump having a suction duct, comm... | 10/02/2007 |
| 7264720 | Pool filter with a pre-filtering unit The invention relates to a pool filter comprising a housing, which can be supported on a ground side on the base, a longitudinal axis and a transversal axis, and a water inlet, a channel outlet and a pool outlet which are embodied in the housing wall thereof. A flow... | 09/04/2007 |
| 7207748 | Water collection and distribution system for yard maintenance A water collection and distribution system for yard maintenance includes a buried reservoir for collecting water from the roof of a structure and a submersed pump in the reservoir for supplying contained water to a pressurized manifold having outlets available for y... | 04/24/2007 |
| 7097046 | Automatically cleaning filter assembly for a liquid-carrying loop A filter assembly for an aquarium has a self-cleaning filter. A fine mesh filter screen is disposed between an inlet and an outlet for filtering solid matter from the water that is pumped from the aquarium, through the filter, and back to the aquarium. When the filt... | 08/29/2006 |
| 7087162 | Accessible well for brine tank A well (12) outside of a brine tank (10) is provided which provides better accessibility to the brine refill valve (112) or other components within the well. Also, apertures (42–48) of differing elevations above the bottom of the brine ... | 08/08/2006 |
| 7083717 | Water purification apparatus A chlorinator connected to a water system includes a hopper for holding chemical tablets on a perforated bed and an underlying basin. A spray head is supported by the perforated bed and sprays water onto the tablets and parallel to the perforated bed. The basin rece... | 08/01/2006 |
| 7037437 | Dual filter system for filtering of injector fluids A filtering system used on a meat injection machine that injects pickling into meat products. The filter consists of a tank and a first and second rotary filter. The first rotary filter uses a wedge wire wound cylinder and augers having flutes that rotate to catch a... | 05/02/2006 |
| 7037474 | Use of sulfide-containing liquors for removing mercury from flue gases A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions m... | 05/02/2006 |
| 7001515 | Dual filter system for filtering of injector fluids A filtering system used on a meat injection machine that injects pickling into meat products. The filter consists of a tank and a first and second rotary filter. The first rotary filter uses a wedge wire wound cylinder and augers having flutes that rotate to catch a... | 02/21/2006 |
| 6994782 | Apparatus for removing phosphorus from waste lagoon effluent An apparatus and method for removing phosphorus from a wastewater effluent stream from a hog waste lagoon. The wastewater effluent is introduced to the bottom of an inverted cone-shaped continuous crystallizer including a fluidized bed of struvite therein. An effect... | 02/07/2006 |
| 6979399 | Sludge recovery apparatus and method A paint spray booth sludge recovery system, apparatus and method is provided for water washed paint spray booths. The spray booths are used with a tank or pit which can accommodate flotation for removal of spent paint. Preferably, the tank has a drop box section, a ... | 12/27/2005 |
| 6962657 | Water treatment system A water treatment system for removing hard ions from source water. The water treatment system is of the type that includes a pair of ion-exchange water softener tanks connectable to a source of pressurized water and with a water system to supply softened water to th... | 11/08/2005 |
| 6905607 | Method for utilizing rainwater collected at buildings A system for making use of rainwater falling on houses and buildings, which comprises a means for removing a predetermined quantity of initial precipitation from the rainwater collected form the roof surface of the building; and a purifier receiving the subsequent r... | 06/14/2005 |
| 6682654 | Sludge recovery apparatus and method A paint spray booth sludge recovery system, apparatus and method is provided for water washed paint spray booths. The spray booths are used with a tank or pit which can accommodate flotation for removal of spent paint. Preferably, the tank has a drop box ... | 01/27/2004 |
| 6551504 | Valve for a fluid treatment system A valve in a fluid treatment system adapted for controlling the flow of fluid between a source and a treatment media disposed in a treatment chamber. The valve includes a housing having a fluid passageway between an inlet and an outlet; a containment cham... | 04/22/2003 |
| 6264832 | Apparatus for the treatment of rain water An apparatus (18) for receiving rain water from a water collecting means (20) and treating this water according to a treatment cycle. The apparatus has a stop tank (24) to hold incoming water while a treatment cycle is being executed in a main tank (32), ... | 07/24/2001 |
| 6129836 | Two-chamber fluid control valve and water softener incorporating same A two-chamber fluid control valve for a water softener system is provided. The valve includes a primary chamber having a primary inlet for passage of a primary fluid into the primary chamber and a primary outlet for passage of fluid out of the primary cha... | 10/10/2000 |
| 6126336 | Apparatus for the complete, continuous separation of a mixture of photopolymers and water with a membrane and filter, for the making of flexible plates useful in printing An etching device for preparing flexible blocks which can be used for printing in flexography, typography or dry offset generally includes an etching tank containing a bath (22) and brushes (3), a stirring and heating device, and an overfill system (20) f... | 10/03/2000 |
| 6063295 | Apparatus and method to increase oxygen levels in livestock drinking water Apparatus to increase the level of oxygen ingested by livestock by oxygenation of the livestock water supply includes an enclosed tank having a top and having an inlet for admitting water from a supply of water and an outlet for discharging water from the... | 05/16/2000 |
| 5498348 | Mobile floating surface skimmer A mobile floating surface skimmer is adapted to float in a body of liquid having debris and/or contaminants at the surface. The skimmer comprises a vessel having an inlet through which liquid from the surface of the body of liquid can flow into the vessel... | 03/12/1996 |
| 5374352 | Universal recycled wash water system A universal recycled wash water plant having a collector tank through which collected wash water and rinse water is channeled to a grease/oil/water separation tank which separates oil and grease from the water and which holds the oil-separated water in a ... | 12/20/1994 |
| 5292431 | Pressurized percolating filter of the type used for the regeneration of water in aquariums A pressurized percolating filter, of the type used for the regeneration of water in aquariums, comprising, a closed receptacle (1), having: a prefiltering chamber (2), defined by a perforated bottom (3) equipped with a uniform plurality of perforations (3... | 03/08/1994 |
| 5271829 | Treatment system for waste water A dispenser for introducing treatment material into an interceptor or grease trap for the purpose of digesting the grease or other hazardous materials which is separated from waste water which flows through the grease trap. The dispenser includes a housin... | 12/21/1993 |
| 5147556 | Thickener A thickener for liquids or pulps includes a tank in which flocculation takes place. A feedwell for feed liquid is disposed within the tank and has a restricted bottom opening in fluid communication with the tank. The bottom opening has an effective cross-... | 09/15/1992 |
| 5068030 | Water filtering sterilizing and heating apparatus A water filtering, sterilizing and heating apparatus is provided. The apparatus includes filter tank provided with activated carbon therein, to filter bacteria, miscellaneous impurities and odor in water. The output of the filter is coupled to a microwave... | 11/26/1991 |
| 5047149 | Apparatus for the clarification of liquids, such as notably water, fruit juices, grape must or similar An apparatus for the clarification of liquids, such as notably water, fruit juices, musts such as grape musts, including an enclosure in which is brought the liquid to be clarified after a pretreatment operation, such as screening, as well as a flotation ... | 09/10/1991 |
| 5019250 | Automatic chemical dispenser An automated chemical dispenser for the dispensation of a chemical into a liquid whereby premature contact of the chemical with the liquid's condensate is to be avoided. The device is, for example, especially well suited for the dispensation of sodium dic... | 05/28/1991 |
| 5015392 | Thickener A thickener for liquids or pulps comprising a tank in which flocculation takes place and dilute liquid is displaced toward the top of the tank, a feedwell having a bottom opening in fluid communication with said tank, conduit means to supply feed liquid t... | 05/14/1991 |
| 4857183 | Apparatus for purifying and neutralizing residues from furnaces An apparatus for purifying and neutralizing residues from furnaces burning liquid or gaseous fuels comprising a settling tank having an inlet for the liquid containing the residues, at least one oil absorption body in the settling tank, and a clean water ... | 08/15/1989 |
| 4775466 | Fuel separator system A control for draining water accumulated in a fuel tank, without loss of fuel or ingestion of water into an associate fuel system, is responsive to a flotation device weighted to float at the water-fuel interface. The flotation device is connected by a le... | 10/04/1988 |
| 4622134 | Apparatus for treating sewage An apparatus for treating sewage is disclosed wherein incoming sewage is in turn put into a balancing tank, an aeration tank and a precipitation tank, settled sludge in the precipitation tank being returned to the aeration tank, which aerates the sewage i... | 11/11/1986 |
| 4492631 | Centrifugal separator A centrifugal separator for separating contaminants from contaminated oil has an outer casing and a rotor within that casing mounted for rotation about a vertical axis. Oil under pressure enters the rotor at one end and at the other end exits through jets... | 01/08/1985 |
| 4446030 | Liquid circulation and pressure tanks Liquid is circulated from bottom to top in a pressure tank by means of a gas pump including an upstanding pipe located within the tank and up through which gas is pumped at a pressure exceeding tank pressure to carry liquid which enters the pipe at the bo... | 05/01/1984 |
