| Patents for B01D 35 - Filtering devices having features not specifically covered by groups , or for applications not specifically covered by groups; Auxiliary devices for filtration; Filter housing constructions (28,776) |
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| 05/07/1991 | US5013882 Labyrinth filter for dielectric of spark erosion systems |
| 05/07/1991 | US5013434 Fluid filter cartridge support housing |
| 05/02/1991 | DE3935483A1 Filter unit for filtering radio active suspension in fluids - has 3 positions for loading, operating and unloading for continuous operation under water in fuel element pond |
| 05/01/1991 | WO1991006703A1 Pulseless screen |
| 04/30/1991 | US5011519 In-line filter and trap structure device for compressed air |
| 04/24/1991 | EP0423827A1 Magnetic treatment device, especially for water |
| 04/24/1991 | CN2075536U Splash-proof flow-changeable filter |
| 04/23/1991 | US5009779 Magnetic element with magnesium coil for filter |
| 04/23/1991 | US5009774 Pulseless screen |
| 04/20/1991 | CA2025726A1 In-line leaf trap |
| 04/18/1991 | WO1991004778A1 Method and device for filtering of suspensions |
| 04/18/1991 | DE3933794A1 Engine oil filter - with runs dry valve integrated with oil pressure control valve |
| 04/17/1991 | EP0423043A1 Filtering device for swimmingpools |
| 04/17/1991 | EP0422387A2 Filling funnel |
| 04/16/1991 | US5008008 Universally adaptable pool water filter structure |
| 04/16/1991 | CA1283031C On-line filtration of potassium permanganate solutions |
| 04/11/1991 | DE4022723A1 Engine lubricating oil filter |
| 04/10/1991 | EP0421080A1 Liquid filter for the lubrication oil of an internal combustion engine |
| 04/10/1991 | EP0236449B1 Apparatus for acoustically removing particles from a magnetic separation matrix |
| 04/09/1991 | US5006264 Siphon filters |
| 04/09/1991 | US5006240 Water-treatment system |
| 04/09/1991 | US5006237 Spin-on oil filter adaptor for four cylinder continental aircraft engines |
| 04/09/1991 | US5006235 Barrier flange filter assembly including cover |
| 04/09/1991 | US5006233 Water purification system |
| 04/04/1991 | WO1991004088A1 Device and method for processing blood for human transfusion |
| 04/03/1991 | EP0419931A1 Plate filter press |
| 03/30/1991 | WO1991004783A1 Filter cartridge manifold |
| 03/30/1991 | CA2042405A1 Filter cartridge manifold |
| 03/29/1991 | CA2013138A1 Liquid control assembly |
| 03/27/1991 | EP0419346A2 Filter for purification of platelets |
| 03/27/1991 | EP0419030A2 Fuel filter with positive water shutoff |
| 03/27/1991 | EP0418440A1 Cartridge and cartridge assembly |
| 03/26/1991 | US5002665 Device for filtering water with filter insert |
| 03/22/1991 | WO1991004087A1 Device for taking up fluids |
| 03/22/1991 | CA2066742A1 Device for taking up fluids |
| 03/21/1991 | WO1991003309A1 Apparatus and method for removal of liquids |
| 03/21/1991 | WO1991003303A1 Magnetic filter |
| 03/21/1991 | WO1991003302A1 Relief valve for liquid filter |
| 03/21/1991 | WO1991003301A1 Fuel filter |
| 03/21/1991 | WO1991003300A1 Oil filter construction for hand spinning |
| 03/21/1991 | WO1991003299A1 Installation for separation of mechanical impurities from a liquid |
| 03/19/1991 | US5000847 Oil filter construction for hand spinning |
| 03/13/1991 | EP0416908A2 Filter system for rejuvenating lubricating oils |
| 03/13/1991 | EP0416351A1 Poolfilter |
| 03/13/1991 | EP0416146A1 Device for the separation of solid particles and fluids with an elevated density from fluids having a lower density |
| 03/13/1991 | CN2072862U Energy-saving filting valve |
| 03/12/1991 | US4999118 Method for dewatering and drying a liquid/solid slurry and an apparatus for using the method |
| 03/12/1991 | US4999108 Having embedded wire which conducts away charge taken from liquid to be filtered |
| 03/12/1991 | US4999106 Apparatus for magnetically conditioning a liquid |
| 03/12/1991 | CA1281296C Filtering system |
| 03/07/1991 | WO1991002700A1 Device for dewatering of forest chemistry waste |
| 03/06/1991 | EP0414879A1 Filter for continuous filtration. |
| 03/06/1991 | CN2072427U Variable angle drying filter |
| 03/06/1991 | CN1049615A Indoor water purification equipment |
| 03/05/1991 | US4997556 Oil filter I |
| 03/05/1991 | US4997555 Fuel filter assembly with heater |
| 02/27/1991 | CN2071977U Multifunctional filter for main-water |
| 02/27/1991 | CN2071976U Gas curtain type gas purifier |
| 02/27/1991 | CN2071975U Regurgitation type filter |
| 02/26/1991 | US4995988 Method and apparatus for thickening a slurry using a compression plate |
| 02/26/1991 | US4995972 Method and apparatus for removing liquid from permeable material |
| 02/26/1991 | US4995239 Liquid line service and process device |
| 02/23/1991 | WO1991002811A1 Resuspendable coated magnetic particles and stable magnetic particle suspensions |
| 02/21/1991 | WO1991001797A1 Mechanism for removing solid particles from a liquid-circulating system |
| 02/20/1991 | CN2071537U Angle-variable quick dirt-clearing type filter |
| 02/19/1991 | WO1991002579A1 Cooking oil filter |
| 02/19/1991 | CA1280377C Filter assembly |
| 02/13/1991 | EP0412332A1 Sifting device |
| 02/13/1991 | EP0412210A1 Decanter prefilter for diesel engine fuel |
| 02/13/1991 | CN1011613B Coupling for pressure or vacuum fluid system |
| 02/12/1991 | US4992171 Filtering device with agitator |
| 02/12/1991 | US4992166 Locking means connecting housing to closure |
| 02/12/1991 | CA1280076C Method and apparatus for thickening a suspension |
| 02/07/1991 | WO1991001173A1 Filter device |
| 02/07/1991 | WO1990015740A3 Collapsible filter for a fluid power apparatus |
| 02/06/1991 | CN1011485B Method and device for purifying oil |
| 02/06/1991 | CN1011484B Equipment for detecting dehydrating slurry flow on pressure net band filter |
| 02/05/1991 | US4990254 Portable water purifier |
| 02/05/1991 | US4990249 Apparatus for the desludging of baths |
| 02/05/1991 | US4990247 Relief valve for liquid filter |
| 02/05/1991 | US4989636 Coupling for pressure of vacuum fluid system |
| 02/05/1991 | CA1279831C Device for inward suction of liquid |
| 02/02/1991 | CA2022417A1 Interstage screen |
| 01/31/1991 | DE4021292A1 Hydraulic oil filter combined with pressure regulator - in one unit also has non-return valve smoothing peak pressures |
| 01/30/1991 | EP0398968A4 Water purification system |
| 01/29/1991 | US4988440 Cooking oil filter |
| 01/29/1991 | US4988437 In-line leaf trap |
| 01/23/1991 | EP0409817A1 Filtering apparatus for separating solid and suspended matter from liquids |
| 01/23/1991 | EP0409400A1 Strainer cup for pop-up drain plug |
| 01/23/1991 | EP0408758A1 Apparatus for indicating contamination degree in a hydraulic circuit and determining method therefor |
| 01/23/1991 | CN1048689A 便携式水净化系统 Portable water purification system |
| 01/22/1991 | US4986904 Color coded disposable filter holder |
| 01/22/1991 | US4986901 Bottled water cap with indicator and adaptor |
| 01/20/1991 | CA2019443A1 Oil burner pump |
| 01/19/1991 | WO1991001463A1 Rotary diverter valve having flat valve interfaces |
| 01/19/1991 | CA2064051A1 Rotary diverter valve having flat valve interfaces |
| 01/19/1991 | CA2021346A1 Filtering apparatus for separating solid and suspended matter from a liquid |
| 01/16/1991 | EP0408377A2 Filter assembly |
| 01/16/1991 | EP0408375A2 Filter assemblies and couplings |
| 01/15/1991 | US4985146 Filtering system |