Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7138045 | Multi-path split cell spacer and electrodialysis stack design An electrodialysis method and apparatus include a source of concentrate fluid, a source of dilute fluid, a collector of treated concentrate fluid, a collector of dilute fluid, an anode and a cathode. A plurality of generally planar spacers are interleaved with a plu... | 11/21/2006 |
| 7101468 | End box of an electrodialyser, electrodialyser comprising same and electrodialysis method Electrodialysis device endbox comprising a vertical electrode (7) and a selectively ion-permeable membrane (10) which is arranged vertically, facing the electrode, and separated from the latter by a vertical passage (19) Electrodialysis d... | 09/05/2006 |
| 7097753 | Dilute support frame for an EDI device The dilute support frame is made up of interphase longitude and latitude bars that preferably are hollow. The bars can be rectangular, rectangular with a rounded end, half-circular, triangular, polygonal or any combination thereof. The bars are sized to support the ... | 08/29/2006 |
| 6607647 | Electrodeionization apparatus with expanded conductive mesh electrode and method An electrodeionization apparatus and method of use includes an expanded conductive mesh electrode. The expanded conductive mesh electrode may be formed from any conductive material that is dimensionally stable and may be coated with conductive coating. Th... | 08/19/2003 |
| 6402920 | Concentrating compartment and spacer construction for electrodeionization apparatus The electrodeionization apparatus is improved in concentration polarization of the ingredients including ions in the concentrating compartment so as to obtain the produced water with high purity. The electrodeionization apparatus has a spacer composed of ... | 06/11/2002 |
| 6344122 | Electrodeionization apparatus An electrodeionization apparatus includes an anode; a cathode; cation-exchange membranes and anion-exchange membranes alternately arranged between the anode and the cathode; desalting compartments and concentrating compartments arranged alternately to be ... | 02/05/2002 |
| 6338784 | Apparatus for producing deionized water An apparatus for producing deionized water, comprising an electrodialyzer having cation exchange membranes and anion exchange membranes alternately arranged to form demineralizing compartments and concentrating compartments and having ion exchangers accom... | 01/15/2002 |
| 6274020 | Electrodialysis membrane and gasket stack system An apparatus and system of operation of an electrodialysis membrane and gasket stack for separation of components in liquid mixtures is disclosed. The system of operation for purification and deionizing liquids includes an operation of pretreatment by fil... | 08/14/2001 |
| 6090258 | Ion-exchange spacer and processes for the preparation thereof The invention provides a polymeric netting for use as an ion-conducting ser in an electrodialysis stack having charged groups incorporated in a in polymeric coating applied thereto, imparting to the spacer an average ion exchange capacity of at least 0.2... | 07/18/2000 |
| 5945192 | Sealing assembly for a solid polymer ion exchange membrane An assembly consisting of at least one seal layer and a solid polymer ion exchange layer wherein the seal layer covers essentially only the region of the ion exchange layer which is to be sealed. The seal layer is made of porous polytetrafluoroethylene fi... | 08/31/1999 |
| 5681438 | Membrane module assembly A membrane module in which non-porous membranes are bonded to spacer elements, which elements are in turn bonded to each other to create a membrane support zone as a result of contact with the surface of the membrane opposite the surface to which the memb... | 10/28/1997 |
| 5407553 | Turbulent flow electrodialysis cell In a multiple-chambered electrodialysis cell having an anode chamber, a cathode chamber, a plurality of brine chambers, and a plurality of desalinate chambers, said chambers defined by a plurality of membranes wherein the improvement comprises providing m... | 04/18/1995 |
| 5203976 | Introducing and removing ion-exchange and other particulates rom an assembled electrodeionization stack Apparatus and method for introducing ion-exchange and other particulates into certain compartments of an assembled electrodeionization stack comprising flowing a slurry of said particulates into the compartments while employing strainers for particulate r... | 04/20/1993 |
| 4863596 | Cell alignment frame assembly A special, easy to use, economical frame is provided to quickly and efficiently align water purification cells in a vertical stack. The dependable, effective frame has moveable side and back posts and convenient crank or slide rod adjustments.... | 09/05/1989 |
| 4737260 | Membrane stack unit for multi-chamber electrodialysis A membrane stack unit for multi-compartment electrodialysis having pairs of mirror-image cell frame parts having an ion-selective membrane between them, the frame parts having supply and connection holes and distribution hole systems which mate with each ... | 04/12/1988 |
| 4639300 | Method and apparatus for electrofiltration This invention relates to a system and method for rapidly and efficiently dewatering or separating particles by electrofiltration in which the suspension of solids is first demineralized. The suspension of solids may be demineralized by electrodialysis, dialys... | 01/27/1987 |
| 4569747 | Modular electrodialysis device There are provided integrated modules for use in electrodialysis devices, which modules comprise a plurality of unit cells each of which consists of a cation specific membrane, a spacer and an anion specific membrane, said membranes being sealed along the... | 02/11/1986 |
| 4303493 | Sealing frame for stacked arrangement of exchanger membranes for electrodialysis A sealing frame for alternately arranged anion and cation exchanger membranes of a membrane stack for electrodialysis. The frame edges surround a chamber provided with a net-like spacer placed or inserted therein, and have oppositely located continuous su... | 12/01/1981 |
| 3993517 | Thin cell electromembrane separator A method is provided for fabricating separators, particularly thin cell electro-membrane separators used in electrodialysis stacks for the desalination of water. The method includes placing a master stencil or mask on top of a plastic mesh which is laid o... | 11/23/1976 |
| 3933617 | Electrodialysis apparatus A filter-press type electrodialysis apparatus imparts excellent uniform distribution of the liquid within the diluting and concentrating cells and low leakage of the liquid between the cells due to the fact that the liquid feeding or discharging means of ... | 01/20/1976 |
