Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8110116 | Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus A water treatment apparatus includes a raw water supply tube, mixed raw water stream jet nozzles each communicating at one end thereof with the raw water supply tube and having at the other end thereof a raw water outlet from which mixed stream of raw water and air ... | 02/07/2012 |
| 8002993 | Bring your own water treatment system A method and apparatus for filtering a fluid is presented. In one embodiment, the apparatus converts contaminated water into water having a lower turbidity and bacterial contamination level than the contaminated water. The apparatus includes a settling unit for at l... | 08/23/2011 |
| 7381336 | Automated water treatment system and method of use An automated method for controlling a solids inventory in a continuous backwashing upflow sand filter system treating a liquid inflow having impurities therein, includes the steps of: monitoring an influent inflow pressure and controlling the air pressure in an air ... | 06/03/2008 |
| 7279107 | Blood component processing system, apparatus, and method A system and method are used in connection with processing of blood components. The processing of blood components may involve centrifugal separation and/or filtering of the blood components. In some examples, at least some blood components are centrifugally separat... | 10/09/2007 |
| 7273556 | Method for treating water containing manganese The invention concerns a method for treating water for human consumption, so as to eliminate manganese and possibly other metals comprising steps which consist in: causing said water to pass at least over a bed of filtering material (3) consisting at least pa... | 09/25/2007 |
| 7267767 | Filtration apparatus A cleansing tank 38 and a screw conveyor 32 are removably mounted to a mounting opening 22 of a filtration tank 2. When the cleansing tank 38 and the screw conveyor 32 are to be removed, they can be extracted to the exterior... | 09/11/2007 |
| 7258798 | Potable water treatment plant and method of maintaining same A package plant for treating raw water to yield potable water. The package plant includes an inlet for raw water, followed by an ozonator for disinfecting the water. Next is provided an up flow roughing filter including a chemically active layer, on top. A slow sand... | 08/21/2007 |
| 7160452 | Filter device A filtration device that enables efficient cleansing and rinsing of filtration media within a short time, in which filtration sand is not likely to become clogged, and in which unevenness within filtration sand is not likely to occur comprising a screw conveyor 3... | 01/09/2007 |
| 7118307 | Cooling water intake system A cooling water intake system is configured to minimize entrainment, impingement and thermal plumes associated with the operation of onshore industrial facilities, such as a power plant, and includes a delivery system guiding ground waters from under the sand bottom... | 10/10/2006 |
| 7081201 | Encapsulated filter cartridge An encapsulated filter cartridge is disclosed, which includes a filter assembly including a carbon block filter element and a microporous filter element. The filter cartridge has a permanently sealed sump defining an interior chamber configured to accommodate the fi... | 07/25/2006 |
| 6953525 | Potable water treatment plant and method of maintaining same A package plant for treating raw water to yield potable water. The package plant includes an inlet for raw water, followed by an ozonator for disinfecting the water. Next is provided an up flow roughing filter including a chemically active layer, on top. A slow sand... | 10/11/2005 |
| 6706521 | Bed cleaning system for fluidized-bed bioreactors A reaction chamber is adapted to contain a fluidized bed having a slurry of liquid, media and biomass. A lift and motive fluid are provided to urge slurry from the reaction chamber through a passage from a slurry inlet to a slurry discharge. The height of the slurry... | 03/16/2004 |
| 6692644 | Process for recovering oil and sulfonates from filtration panel Process for treating filtration panels obtained by the filtration of oils containing sulfonates of earth-alkaline metal, the above filtration being carried out in the presence of filter aids essentially consisting of siliceous material, which comprises: (... | 02/17/2004 |
| 6641737 | Vertical filter A liquid filtering apparatus is placed in a vessel having a bed of filtration material and an intake for introducing unfiltered liquid, that includes a washbox, an airlifting tube extending from the washbox and including an intake end and means for introd... | 11/04/2003 |
| 6596160 | Periodic ozone treatment system for a showering tower type water cooling system A periodic ozone treatment system for a showering tower type water cooling system worked once daily for a period of 10~30 minutes essentially comprises: an ozone dissolving tank to prepare high density ozone solution therein and periodically fed to the co... | 07/22/2003 |
| 6426005 | Sequential descending bed filters with reject/washwater containing impurities being fed to a separate unit for elimination of impurities A treatment system for treating water/wastewater includes two continuously operating granular media filters that are operated together in series. The water/wastewater to be treated is introduced as an influent into the first of the granular media filters ... | 07/30/2002 |
| 6387283 | Descending bed, continuously regenerating type filter with an adjustable length wash chamber An apparatus for continuously filtering a suspension includes a filter-medium washer provided with length-adjustable walls.... | 05/14/2002 |
| 6361701 | Method and device for continuous filtration of liquids The invention relates to a method and device for the continuous filtration of liquids containing solid matter, in particular for cleaning wastewater, by means of a filter bed consisting of a particulate filtering medium, which is continuously moved throug... | 03/26/2002 |
| 6238567 | Method of making brine for regeneration of a softening appliance Described is a method for making brine to be used for regenerating water softening appliances. The brine is made in a reservoir having a float mechanism therein coupled to a seal that prevents the brine from dropping below a predetermined level in the res... | 05/29/2001 |
| 6190568 | Method for retrofitting a false bottom underdrain filter system A method for retrofitting a gravity filter with a porous plate filter media support that increase filter production by increasing the depth of the media, allows installation of an air backwash system in filters having a monolithic underdrain system, and r... | 02/20/2001 |
| 6117459 | Filtration adjuvants, filtration supports, filtration process using them and process for regenerating said adjuvants The invention relates to new regenerable filtration adjuvants which are usable for the filtration of liquids, particularly beer at the end of the secondary fermentation storage, characterized in that they comprise synthetic or natural incompressible polym... | 09/12/2000 |
| 6110389 | Filtration unit A filtration tank (1) for purification of polluted water includes a chamber (12). Upper and lower filtration screens (20, 22) are supported within the chamber. Filtration particles (18) are confined between the upper and lower screens. Polluted water ente... | 08/29/2000 |
| 6077446 | Sand filtration filtering system using ozone A device for filtering and disinfecting a fluid, such as waste water, is provided. The device includes a housing having an interior and a fluid inlet conduit in flow communication with the interior of the housing. An ozone source is in flow communication ... | 06/20/2000 |
| 6015502 | Reversing flow coalescing system Apparatus is provided for coalescing microscopic droplets of organic (principally hydrocarbons) that are present with particles in an aqueous stream (primarily water), which avoids frequent shutdowns for backwashing. The system includes two anthracite bed... | 01/18/2000 |
| 5945005 | Fluid filter using floating media A filter system (110) includes a tank (130) with a conveyer (140) for, preferably continuously, conveying filter media (11) from a filter zone (119) in the tank (130) where the filter media (11) traps predetermined matter (16), such as particulates, to a ... | 08/31/1999 |
| 5904854 | Method for purifying water A composite adsorbent element comprising a packed mixture of granules and fibers, which are desirably granular activated carbon (GAC) and activated carbon fiber (ACF). The element is employed as a filter for purifying tap water. In the composite adsorbent... | 05/18/1999 |
| 5902488 | Slow sand filter A slow sand filter system having a slow sand filter located under water and a scraping mechanism. The scraping mechanism has at least one auger and a shaft, the auger extending across the width of the slow sand filter and being supported in the center the... | 05/11/1999 |
| 5833867 | System and method for backwashing multiple filtration vessels A filter media washing system for washing contaminants from filter media of a plurality of filtration vessels. Each filtration vessel has a filtration screen subdividing the filtration vessel into a filter media containing chamber and a filter media-free ... | 11/10/1998 |
| 5788842 | Biomass separation apparatus and method A separator for use with a fluidized-bed bioreactor. A lift draws a slurry of liquid, media and biomass from the fluidized bed. A biomass discharge is connected to the lift and located above the height of the fluidized bed for discharging excess biomass. ... | 08/04/1998 |
| 5776354 | Use of a porous, particulate material in a packed filter bed for liquid/gas and/or liquid/liquid separation A method for the use of a porous, preferably dimensionally stable, particulate material in a packed filter bed for separating a disperse liquid phase from a gas and/or separating a disperse liquid phase from a liquid, with the average size of the particle... | 07/07/1998 |
| 5766488 | Method and apparatus for water treatment An apparatus for treating water includes a vertically extending contact vessel, wherein water is contacted with ozone, and a return vessel which contains a column of water of a sufficient height to drive water through downstream solids separation stages. ... | 06/16/1998 |
| 5762801 | Process and apparatus for biological treatment of water In the biological purification of sewage water or drinking water, it is known to purify the water in a filter bed of granular filter medium, wherein the filter medium is transported from the bottom of the bed to its upper side with the aid of air, so as t... | 06/09/1998 |
| 5755959 | Device for supplying a suspension to a filter at different levels within the filter and in proportions such that a uniformly distributed flow of suspension is achieved across the filter area A suspension is delivered to a filter bed comprised of granular filter medium in a continuously working filter at the lower part of the bed and is then permitted to flow upwards through the bed. With the intention of optimizing the capacity of the filter,... | 05/26/1998 |
| 5750028 | Biomass separation apparatus and method with media return A separator is provided for use with a fluidized-bed bioreactor. A lift draws a slurry of liquid, media and biomass from the fluidized bed. A biomass discharge is connected to the lift for discharging excess biomass. A media discharge, also connected to t... | 05/12/1998 |
| 5730886 | Continuous self-cleaning filtration unit An improved vertical filtration unit includes a bell-shaped lower end for the air-lift tube, an injection ring for introducing air into the air-lift tube at a considerable volume, and a washbox with a more efficient scrubbing arrangement for washing dirt ... | 03/24/1998 |
| 5698106 | Filtration process and apparatus It is possible to filter a suspension or emulsion in a filter bed of particulate filter medium by allowing the suspension to flow upwards through the filter bed simultaneously as the medium flows downwards through a filtering tank wherein filtration takes... | 12/16/1997 |
| 5635080 | Filter system with external scrubber Method and apparatus by which contaminants are removed from a liquid flowing through a filter vessel having an inlet for providing a contaminated liquid flow into one end thereof and an outlet through which filtered liquid can exit the vessel. A filter sc... | 06/03/1997 |
| 5573671 | Method of and apparatus for water purification A biological purification process, a secondary treatment of partially cleaned waste water for example, is carried out in a porous bed of loose granules which float in the liquid. The granules are continuously washed to remove coagulated impurities by mean... | 11/12/1996 |
| 5514284 | Method and apparatus for water treatment An apparatus for treating water includes a vertically extending contact vessel, wherein water is contacted with ozone, and a return vessel which contains a column of water of a sufficient height to drive water through downstream filtering stages. Ozone is... | 05/07/1996 |
| 5454959 | Moving bed filters A moving bed filter in which the liquid to be filtered is introduced into an internal chamber centrally disposed in the filter bed. The liquid flows through the filter bed to filtration nozzles which are disposed near the outer periphery of the filter bed... | 10/03/1995 |
