Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7442293 | Oil/water separation apparatus for oil-containing mixture Oil adsorbent layers 4 and packed layers 5 are alternately laminated inside a treatment vessel 2, the oil adsorbent layers 4 comprise ten laminated flat sheets 4a composed of polypropylene, and gelled aluminum hydroxide 1... | 10/28/2008 |
| 7407533 | Active filter element for end face incident flow A filter element formed from at least one flat layer of permeable filter medium alternating with at least one pleated layer in such a way that the resulting channels have an open, especially triangular, cross section, a first group of channels being tightly sealed a... | 08/05/2008 |
| 7311751 | Filter medium A filter medium includes at least a first and a second layer. Both first and second layers have a layer volume VLq and a layer filtering surface SLq, where SLq is the accumulation of all mantle surfaces of the fibers present in this layer q. The first layer has a SL... | 12/25/2007 |
| 7252764 | Method for fabrication of a molecular filter and apparatus formed by the same The invention is a method for fabricating molecular filters which can separate objects approximately 1-5 nm in range, where the filtration size is controlled by using thin films of materials and technologies to form a filtration channel or pore in a middle thin film... | 08/07/2007 |
| 7192528 | Self-cleaning filter apparatus A self-cleaning filter system is disclosed that includes an inlet fitting that is adapted to be inserted into an existing filter body. A spray tube having a plurality of outlets that slideably engages the inlet fitting, is positioned in the ring discs of the existin... | 03/20/2007 |
| 7153425 | Process and filter for filtering a slurry The present invention comprises a process for filtering a slurry and a filter cartridge construction for filtering a slurry having a filtration medium formed of a depth filter such as a cylindrical seamless fibrous depth filter comprising a nonwoven fibrous mass, wo... | 12/26/2006 |
| 7128772 | Filter assembly, process for producing the filter assembly and filter body having the filter assembly A filter assembly through which a fluid can flow and a method for the production thereof are provided. The filter assembly includes at least one covering layer made of an at least partially porous material with at least one boundary region and includes at least one ... | 10/31/2006 |
| 7086460 | In-situ filters, method of forming same and systems for controlling proppant flowback employing same The present invention is directed to a method and apparatus for controlling the flowback of proppants that have been placed inside fractures of a subterranean formation. The apparatus is defined by a plurality of solid balls, which comprise compressed springs that a... | 08/08/2006 |
| 7051883 | Wetlaid-spunbond laminate membrane support Nonwoven fabric laminates suitable for use as semipermeable membrane supports are provided. The fabric laminates generally include at least two layers: a spunbond layer of continuous filament fibers and a wet-laid layer of discontinuous filaments. The resulting semi... | 05/30/2006 |
| 6953124 | Filter element with end face inlets and discharge outlets A filter element for end face inlet formed of triangular channels which are alternately closed such that the fluid to be filtered must pass through the filter material in order to flow from the inlet side (22) to the discharge side (23). The channels a... | 10/11/2005 |
| 6923909 | Disc filter housing and filter disc thereof A variable compression disc filter housing secures a circumferentially welded composite layer of filter disc material for filtering a small amount of liquid for determining the optimum filter media material for specific production applications. ... | 08/02/2005 |
| 6918951 | Disc-type air filters An air filter includes a stack of filter discs formed with contacting faces having surface formations defining filtering passageways between adjacent discs for removing solid particles from the air passing through the stack. The filter discs in the stack further inc... | 07/19/2005 |
| 6827851 | Filter module The invention relates to a filter module (4) with a simplified design which allows for the manufacturing of a step filter, Each ply of filter medium is composed of a deep-bed filter material layer (1, 1a-d) and the packing is composed of drainin... | 12/07/2004 |
| 6825136 | Filtering screens for vibratory separation equipment A filtering screen comprises a fine woven wirecloth filtering mesh (4) disposed above a coarse woven wirecloth support mesh (2). An intermediate woven wirecloth mesh (3) is disposed between the fine woven mesh (4) and the coarse woven mes... | 11/30/2004 |
| 6818130 | Method and apparatus for multistage liquid filtration The present invention provides a multistage liquid filtering apparatus and a multistage process for filtering microorganisms and other unwanted impurities from the liquid. The invention employs a microorganism-removing filter stage prior to an activated carbon filte... | 11/16/2004 |
| 6799686 | Tubular filtration apparatus An expandable well screen has a desirable thin-wall construction together with a simplified fabrication method. In fabricating the screen, a flexible sheet of metal mesh filter media is diffusion bonded to an inner side of a perforated metal sheet which is then defo... | 10/05/2004 |
| 6716349 | Filter for diesel engine fuel A filter for Diesel engine fuel, comprising a filtering mass which is contained within an enclosure and is provided so as to be crossed by the fuel in its path inside the filter between an intake connector and a discharge connector. The enclosure comprises a water c... | 04/06/2004 |
| 6695148 | Transmission filter felt A transmission fluid filter material and transmission filter produced therefrom comprising a gradient density composite felt which exhibits high particle removal efficiency at 40 micron diameter particle size and larger with exceptionally high dirt holdin... | 02/24/2004 |
| 6602407 | Oriented structure for treating a fluid An oriented structure for treating a fluid, comprising an inlet end for receiving a fluid to be treated and an outlet end opposite the inlet end and from which a treated fluid is discharged, the fluid being allowed to flow into the structure from the inle... | 08/05/2003 |
| 6579458 | Screening device A screening device includes a screening element connected to a reinforcing element by a frictionally engaging clamping connection. Spacers located between the screening element and the reinforcing element provide a radial clearance therebetween. The scree... | 06/17/2003 |
| 6527954 | Layered bag filter elements A filter element to be installed into a housing to constitute a filter assembly for separation of solids in a fluid is constructed from one or more baggy filtering mediums made of porous membrane or non-woven fabric of synthetic plastic, passageway materi... | 03/04/2003 |
| 6458283 | Lost circulation fluid treatment A method for separating fluid and fibrous lost circulation material from a mixture thereof that also includes drilled cuttings, the method including introducing the mixture onto a screen assembly that is vibrating for passage of the fluid and fibrous lost... | 10/01/2002 |
| 6454942 | Liquid separation membrane module A liquid separation membrane module includes a semipermeable membrane receiving a pressure of a feed liquid, and a channel material arranged so as to support the back side of the semipermeable membrane. The channel material is a tricot knitted fabric knit... | 09/24/2002 |
| 6422396 | Coalescer for hydrocarbons containing surfactant A coalescer filter element for the separation of water from hydrocarbon fluids, such as kerosene, jet fuel, diesel fuel, and gasoline under surfactant conditions such as thermal stability additive and dispersant. Coalescer fibrous material has hydrophobic... | 07/23/2002 |
| 6391200 | Filter and method of filtering a fluid A spiral wound filter element is disclosed which includes alternating layers of filter medium and diffusion medium wrapped about a cylindrical core defining a central axis of the filter element. The alternating layers extend from a radially innermost laye... | 05/21/2002 |
| 6391097 | Filtration disc including electric field formation A multiple disc filter includes a plurality of discs arranged in a stack with a face of each disc in contact with a face of the next adjacent disc in the stack. The contacting faces of the discs include surface formations defining small filtering passagew... | 05/21/2002 |
| 6371306 | Lost circulation fluid treatment A method for separating fluid from a mixture of fluid and fibrous lost circulation material, the method including introducing the mixture onto a screen assembly that is vibrating for passage of the fluid through the screen assembly and for separation of f... | 04/16/2002 |
| 6352111 | Filter for subterranean wells A subterranean filter to remove particles from production fluid in a well includes a perforated inner member, at least one filter membrane made of a non-woven polymer material and a metal braided layer installed around the membrane and inner member to pro... | 03/05/2002 |
| 6306300 | Filter cartridges and filter cells The invention provides a filter cell and a filter cartridge in which the filter cell includes an inner separator disc having a central aperture about which is located a plurality of upstanding pins or teeth, the pins or teeth being formed integrally with ... | 10/23/2001 |
| 6274041 | Integrated filter combining physical adsorption and electrokinetic adsorption An integrated filter for removing impurities from a fluid stream. The filter includes a first element adapted to remove at least some of the impurities by physical adsorption, and a second element adapted to remove at least some of the impurities by elect... | 08/14/2001 |
| 6238561 | Corrugated axial filter with simple fold pattern and method of making it A corrugated axial filter (148) has a plurality of flow channels (178, 180, 182, 184, 208, 212) extending axially from the upstream dirty frontside (146) of the filter to the downstream clean backside (160) of the filter. Each channel has an upstream open... | 05/29/2001 |
| 6237780 | Vibratory separator screens A screen for a vibratory separator for screening fluid with material entrained therein introduced on the screen, the screen having, in certain aspects, a plurality of warp wires and a plurality of shute wires, the warp wires interwoven with the shute wire... | 05/29/2001 |
| 6235195 | Filter element incorporating a handle member A filter arrangement includes a filter element configured for straight through flow and a handle member secured to the filter element. The filter element may typically have a plurality of flutes where selected ones of the flutes are open at upstream porti... | 05/22/2001 |
| 6117322 | Dynamic filter system A dynamic filter system includes a dynamic filter assembly including one or more filter elements and one or more members disposed within a housing. The filter elements and the members are interleaved and arranged to rotate with respect to one another. The... | 09/12/2000 |
| 6102212 | Filter element A filter element for a pressure filter where a substantially horizontal wall (3) divides the interior of a pressure vessel into a lower inlet compartment (5) and an upper outlet compartment (6). A filter element (20) having a filter medium (40) is suspend... | 08/15/2000 |
| 6019891 | Debris vacuum device for spas/hot tubs Debris vacuum device including a suction bulb. In a first embodiment the suction bulb includes a hollow tube with an inlet check valve located at one end and an exhaust check valve located at the opposing end. A screen is provided to extend across the int... | 02/01/2000 |
| 6000094 | Replaceable filter for use in cleaning buckets A removable and replaceable filter and filter holder is mounted within a mop cleaning bucket to receive dirt settling under gravity from the contained liquid with the dirt collecting in, and passing through so as to be trapped below, the filter and its ho... | 12/14/1999 |
| 6000558 | Filter cartridge construction and process for filtering particle-containing paint composition A filter element for filtering a particle-containing paint composition or a particle loading slurry composition which is a precursor to a particle-containing paint composition is provided. The filtration element comprises at least one filtration layer for... | 12/14/1999 |
| 5980759 | Dual media filter cartridge construction A filter cartridge is provided which includes (a) a wound depth filter or a cylindrical seamless depth filter and (b) a pleated filter having a lower micron retention rating than the depth filter. The depth filter and pleated filter surround a central ope... | 11/09/1999 |
| 5944991 | Pipeline strainer A pipeline strainer having a body defining a rectilinear flow passage between an inlet and an outlet and a cylindrical cavity centrally located therebetween. A removable cover of cup-like configuration is secured in a sealed relation to the body subtendin... | 08/31/1999 |
