| Patents for B01D 33 - Filters with filtering elements which move during the filtering operation (10,149) |
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| 09/11/1990 | US4956101 Liquid filtration device and method using wave motion |
| 09/11/1990 | US4956088 Method and apparatus for pressurized dewatering |
| 09/11/1990 | US4955482 Screen cleaning in cil & cip systems |
| 09/05/1990 | EP0385006A1 Removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range |
| 09/05/1990 | EP0385005A1 Removing haze from a hydrocarbon oil mixture boiling in the lubricating oil range |
| 09/04/1990 | US4954268 Process for removing cellulose ethers from a cellulose ether suspension |
| 09/04/1990 | CA1273526A1 Apparatus for separating the liquid phase of a solid/liquid suspension |
| 08/28/1990 | US4951805 Feed hopper with distributor elements |
| 08/22/1990 | EP0383527A1 Self-cleaning filter |
| 08/21/1990 | US4950403 Screen segment for filters for thickening fiber suspensions |
| 08/21/1990 | US4950402 Rotating element for a screening apparatus with a contour surface |
| 08/21/1990 | US4950399 Side seal for a liquid filter device |
| 08/07/1990 | US4946731 Fabric impregnated with polymer resin |
| 08/07/1990 | US4946602 Method of cleaning filter discs in a suction dryer using ultrasonic vibration |
| 08/07/1990 | CA1272452A1 Tightness device between the conveyor belt and the collecting box with one or more compartments of a vacuum belt filter |
| 08/02/1990 | DE3902393A1 Process for separating out solids from a solid/liquid mixture |
| 07/31/1990 | US4944874 Centrifugal separator |
| 07/31/1990 | US4944167 Pulp treating apparatus |
| 07/26/1990 | WO1990007968A1 Frontal separator system for separating particles from fluids |
| 07/25/1990 | WO1990008645A1 An apparatus for dewatering and squeezing material |
| 07/25/1990 | EP0280094B1 Filter segment for a filter for thickening a fibrous suspension |
| 07/25/1990 | CA2025769A1 Apparatus for dewatering and squeezing material |
| 07/24/1990 | US4943372 Method and apparatus of discharging a disc filter |
| 07/18/1990 | EP0378412A2 In-situ repair of damaged filter cloths used in solvent dewaxing filters |
| 07/18/1990 | EP0377824A2 Device for separating solids from suspension |
| 07/12/1990 | WO1990007368A1 A device at rotating filters |
| 07/11/1990 | EP0377427A2 Double diffuser with backflush pistons |
| 07/11/1990 | EP0377054A1 Pressure filter |
| 07/10/1990 | US4940535 Solids flow distribution apparatus |
| 07/04/1990 | EP0376639A2 Filter deck assembly |
| 07/03/1990 | US4938038 Material processing system |
| 06/28/1990 | WO1990006800A1 Process and device for the separation of substances from mixtures |
| 06/27/1990 | CN1043274A Pressure-fed separation apparatus |
| 06/26/1990 | US4936992 Arrangement of rotating filters for improved filtrate discharge |
| 06/26/1990 | US4936986 Oil/liquid separation filter system |
| 06/26/1990 | US4936118 Material processing system |
| 06/26/1990 | CA1270608A1 Separation of caustic liquor, lime sludge and sludge in a causticising process |
| 06/21/1990 | DE3842557A1 Apparatus and process for separating off solids from a liquid by filtration |
| 06/19/1990 | US4935138 Press-filter with endless filtering webs |
| 06/19/1990 | US4935131 Dual-flow band screen conversion apparatus |
| 06/13/1990 | EP0372083A1 Slurry filtering apparatus |
| 06/05/1990 | US4931179 Filter section for a rotatable filter |
| 06/05/1990 | US4931176 Installation for the separation of the constituents of a suspension |
| 06/05/1990 | CA1269961A1 Device for distributing a material upon a surface |
| 05/31/1990 | WO1990005576A1 Separating filter for separating a pulp |
| 05/31/1990 | WO1990005575A1 Method and device for separation of particles |
| 05/31/1990 | WO1990005574A1 Automatic pressure filter |
| 05/30/1990 | EP0370779A2 Pressure-fed separation apparatus |
| 05/30/1990 | EP0370294A1 Scraper for a rotating filter |
| 05/30/1990 | EP0370118A1 Filterapparatus for the purification of a liquid |
| 05/29/1990 | US4929355 Method and apparatus for the separation of caustic liquor, lime sludge and sludge in a causticizing process |
| 05/29/1990 | US4929350 Rotary screw fish collector |
| 05/23/1990 | EP0369611A2 Apparatus for thickening pulp and paper stock |
| 05/23/1990 | EP0368929A1 Trough-shaped filter plate for rotary pressure filters |
| 05/19/1990 | CA2003215A1 Stripping device for rotary filters |
| 05/17/1990 | CA2003109A1 Automatic filter press |
| 05/17/1990 | CA2003108A1 Filter separator for separating a composite fluid |
| 05/15/1990 | US4925576 Continuous discharge centrifuge |
| 05/15/1990 | US4925557 Multi-purpose rotating membrane filter |
| 05/10/1990 | DE3837956A1 Apparatus for lateral sealing of press rolls |
| 05/09/1990 | CN1041888A Waterflow differential electrical charging process for ores |
| 05/08/1990 | US4923605 Filter bag for a filter section |
| 05/03/1990 | WO1990004467A1 Drilling mud separation system |
| 05/03/1990 | WO1990004446A1 Rotary screening device |
| 05/03/1990 | DE3836530A1 Method for operating a filter |
| 05/01/1990 | US4921618 Inverted separation and transfer device, and process for using same |
| 05/01/1990 | US4921608 Filtration apparatus having belts for treating waste product |
| 05/01/1990 | US4921602 Filter for liquids |
| 05/01/1990 | CA1268427A1 Filter for continuous filtering of a suspension under pressure |
| 04/26/1990 | DE3835610A1 Filter device |
| 04/26/1990 | DE3830780A1 Filter apparatus for separating off solids from liquids |
| 04/25/1990 | EP0365165A2 A method and an apparatus for extracting liquid from a sludge |
| 04/25/1990 | CN1041537A Backwash filter |
| 04/24/1990 | US4919825 Filter apparatus and method for separating contaminants from liquids |
| 04/24/1990 | US4919806 Cross-flow type filter system |
| 04/24/1990 | US4919158 Method and apparatus for washing pulp |
| 04/24/1990 | CA1268068A1 Spiral wire belt |
| 04/19/1990 | WO1990003846A1 Waterflow differential electrical charging process for ores |
| 04/19/1990 | WO1990003833A1 Continuous backwashing filter apparatus |
| 04/19/1990 | DE3835326A1 Apparatus for separating off and collecting solids from a liquid stream |
| 04/19/1990 | DE3834982A1 Apparatus for separating off and pressing out solids from liquids |
| 04/17/1990 | CA1267770A1 Process and apparatus for the purification of contaminated sulfur |
| 04/10/1990 | US4915850 Filtration of drilling mods |
| 04/05/1990 | WO1990003211A1 Inversion tube press |
| 04/04/1990 | EP0361217A1 Brack-wash filter |
| 04/03/1990 | CA1267367A1 Procedure for filtering lime sludge meant to be regenerated to lime |
| 03/27/1990 | US4911847 Process for controlling the permeate composition in a rotary filtration device |
| 03/27/1990 | US4911834 Drilling mud separation system |
| 03/27/1990 | CA1267018A1 Method of making a seamless dish-shaped diaphragm from sheet material |
| 03/22/1990 | DE3831684A1 Method for screening or filtering drinking water, service water and waste water |
| 03/20/1990 | US4909932 Tubular container; movable and fixed filter |
| 03/20/1990 | US4909851 Free-flowing, storage stability, dehydrated flake form |
| 03/20/1990 | US4908896 Backflushing pressure diffuser screens |
| 03/15/1990 | DE3925198A1 Monitoring successive stages of centrifugal slurry filtration - by vibration sensor mounted on arm pivoting towards sieve surface |
| 03/15/1990 | DE3829936A1 Method for dehumidifying a filter cake |
| 03/14/1990 | EP0358281A2 Liquid manure injector |
| 03/14/1990 | EP0357809A1 Rotary drum type solid-liquid separation apparatus |
| 03/13/1990 | US4908136 Method and apparatus for forming and ion-exchanging a filter cake |
| 03/13/1990 | US4908082 Washing with oil wax solvent, rinsing, drying, applying epoxy adhesive, curing |
| 03/07/1990 | EP0251840B1 Process and individual apparatus for the filtration of a liquid |