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| Number | Title | Issue Date |
| 7566398 | Water filtering device Provided is a water filtering device for a humidifier capable of increasing the filling amount of an ion exchange resin by including a separate inner cylinder having upper and lower diameters that are different from each other, increasing adsorption and removal effi... | 07/28/2009 |
| 7306726 | Method for treating metal-working fluid A method for treating metal-working fluid comprises reducing a concentration in the metal-working fluid of at least one metal by passing the metal-working fluid through an ion-exchange filter. The at least one metal may comprise cobalt or one or more other metal(s).... | 12/11/2007 |
| 7229560 | Sack-based processes for recovering oil floating on water One or more water- and oil-porous containers or sacks are made of a pair of mesh sheets affixed together and stiffened around their perimeter. The sacks can be partially filled with a multitude of tubular bodies made of an oil-entrapping polymer, which have their lo... | 06/12/2007 |
| 7094338 | Method of making and using a filter in the form of a block of agglomerated copolymer fragments One of the exemplary filter systems described includes a bracket and a filter module that can be suspended from the bracket by a plurality of flexible supports. The bracket can support the filter system beneath the grate of a storm drain without the need for the fil... | 08/22/2006 |
| 7048878 | Process of forming oil-absorbent bodies A process for forming an oil-sorbent composition of matter with bound combinations of styrene-butadiene-styrene (SBS) and ethylene propylene diene monomer (EPDM) utilizes a low-temperature extrusion process. The SBS, or both materials, may be in the form of multitud... | 05/23/2006 |
| 6921477 | Groundwater treatment system and method A groundwater treatment system, which includes subterranean inlet, treatment, and outlet portions. The inlet portion is configured to collect groundwater from an aquifer. The treatment portion includes a replaceable treatment media and is configured to receive the g... | 07/26/2005 |
| 6719899 | Access valve devices, their use in separation apparatus, and corresponding methods An access valve suitable for controlling fluid flow into and out of a chromatography column has a central axially movable probe with a head acting as a spool valve in a barrel. Axial movement of the probe adjusts the valve between a fully open condition, in which bo... | 04/13/2004 |
| 6524484 | Access valve devices, their use in separation apparatus, and corresponding methods An access valve suitable for controlling fluid flow into and out of a chromatography column has a central axially movable probe with a head acting as a spool valve in a barrel. Axial movement of the probe adjusts the valve between a fully open condition, ... | 02/25/2003 |
| 6277283 | Access valve devices, their use in separation apparatus, and corresponding methods An access valve suitable for controlling fluid flow into and out of a chromatography column has a central axially movable probe with a head (71) acting as a spool valve in a barrel (6). Axial movement of the probe adjusts the valve between a fully open co... | 08/21/2001 |
| 6123849 | Chromatographic column and valve A chromatography column having at least one central slurry valve positioned at either the top cell assembly and/or the bottom cell assembly. The central slurry valves have a pneumatically actuated valve sleeve which can be shifted to create two different ... | 09/26/2000 |
| 6090279 | Access valve devices, their use in separation apparatus, and corresponding methods An access valve suitable for controlling fluid flow into and out of a chromatography column has a central axially movable probe with a head (71) acting as a spool valve in a barrel (6). Axial movement of the probe adjusts the valve between a fully open co... | 07/18/2000 |
| 5902485 | Access valve devices, their use in separation apparatus and corresponding methods An access valve suitable for controlling fluid flow into and out of a chromatography column has relatively movable valve elements preferably represented by a central axially movable probe with a head acting as a spool valve in a barrel. Axial movement of ... | 05/11/1999 |
| 5534133 | Continuous method for increasing the Q. I. concentration of liquid tar while concurrently producing a Q. I. free tar Continuous method for treating a liquid tar containing Q.I. solids to provide a liquid tar product having increased Q.I. concentration and, concurrently, a Q.I. free liquid tar product. The method utilizes cross-flow filter membranes.... | 07/09/1996 |
| 5294337 | Water filtration system A water filtration system is disclosed for removing solid particulates from water, and in particular from storm water collection basins prior to passage into a storm water sewer system, comprising an ingress conduit to bring water into the system, a prima... | 03/15/1994 |
| 5032261 | Compact biofilter for drinking water treatment A filtration system for filtering out bacteria, Giardia cysts, turbidity and other impurities in raw water supplied to a home or the like including a sealed container divided into an upper and a lower chamber by a support plate, the support plate supporti... | 07/16/1991 |
| 4983286 | Sterilizing water-purifying reagent for drink This invention provides a sterilizing water-purifying reagent for removing muddiness of water to be treated or sterilizing the water to be treated as drinking water in fields or under drinking water shortage environment, and the sterilizing water-purifyin... | 01/08/1991 |
| 4413813 | Disposable bed filter apparatus A disposable bed filter for removing particulate matter and/or reducing oxygen in a poured metal melt is located within a trough. The bed filter preferably comprises discrete layers of bed media located in a trough between entry and exit baffle plates. Th... | 11/08/1983 |
| 4211655 | Upflow filter construction An upflow filter usable with a home sewage treatment plant, and including a container therefor. The container comprises a dividing wall extending thereacross dividing it into first and second filtering chambers, each of which has a grating therein serving... | 07/08/1980 |
| 4178249 | Modular container An improved modular container for containing particulate material and providing a flow path for contaminated liquid to be purified. The improved modular container includes a pair of containment disks mounted within a housing frame having particulate mater... | 12/11/1979 |
| 4172796 | Water purifier apparatus A water purification device includes a housing having a base portion and a generally-cylindrical cup-shaped cap removably secured thereto. An input fluid channel in the base portion communicates with one end of the chamber defined by the cup and an outlet... | 10/30/1979 |
| 4009102 | Containerized water refiner exchange system A water refining system in which spent refining material is removed on a batch basis in small portable containers for regeneration of the material at a central processing plant. The spent material is then replaced with new or regenerated material using a ... | 02/22/1977 |
| 3951811 | Modular container A modular container which includes a housing frame containing particulate material through which contaminated liquid is passed for purposes of purification. The container includes flow distribution members which are secured within the housing frame for di... | 04/20/1976 |
| 3950252 | Upflow filter An upflow filter adapted to be used with a home sewage treatment plant which includes a container which has a wall extending thereacross to divide the container into first and second filtering chambers. First and second gratings are located in the first a... | 04/13/1976 |
