| Patents for B01D 41 - Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids (1,149) |
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| 11/30/1994 | CN1026760C Pneumatic device for cleaning air filters |
| 11/29/1994 | US5368752 Method of washing filters, and filters for liquid filtration |
| 11/08/1994 | US5361790 Apparatus and method for cleaning a filter assembly |
| 10/27/1994 | DE4313132A1 Method for the cleaning of particle filters and particle filter |
| 10/19/1994 | EP0619753A1 Process and device for removing deposits from filter auxiliaries |
| 09/06/1994 | US5344574 Separation of oil from transformer filter cake |
| 09/06/1994 | US5344565 Method of treating a clogged porous medium |
| 07/26/1994 | US5332448 Apparatus for cleaning air filters |
| 07/21/1994 | WO1994015692A1 Process for cleaning used oil filters |
| 07/19/1994 | US5330065 Cartridge filter cleaning rotatable rack |
| 06/29/1994 | CN2170144Y Environmental protection dust collector |
| 06/28/1994 | US5324443 A carboxylic acid and /or salt thereof; a nonionic surfactant based on oxyalkylated linear alcohols; a water soluble organic solvent |
| 06/21/1994 | US5322535 Pneumatic filter cleaning apparatus |
| 05/18/1994 | EP0597309A1 Method of purification of a filter material used for cleansing of liquids |
| 05/17/1994 | US5311671 Apparatus for recovering dry cleaning fluid |
| 05/11/1994 | WO1994009883A1 A method and an apparatus for removing solids from a liquid |
| 04/28/1994 | WO1994008693A1 Process and device for removing deposits from filter auxiliaries |
| 04/26/1994 | US5305493 Pneumatic device for cleaning air filters |
| 04/05/1994 | US5299352 Apparatus for dismantling filter inserts |
| 03/29/1994 | US5298079 Simultaneous crushing and washing |
| 12/01/1993 | EP0572356A1 Apparatus and process for cleaning with a liquid of filter cartridges in fluidised powder apparatus or in spray-dryers |
| 11/23/1993 | US5263503 Filter cartridge cleaning mechanism |
| 11/10/1993 | CN1078167A Apparatus and method for cleaning a filter assembly |
| 10/05/1993 | US5249608 Process and flushing device for removing oil from waste oil filters |
| 09/21/1993 | US5246589 Repaired filtration elements for polymer manufacture |
| 08/31/1993 | US5240613 Process for regenerating clogged filters |
| 08/04/1993 | EP0553076A1 A method of washing filters, and filters for liquid filtration. |
| 08/03/1993 | US5232478 Electronic air filter |
| 07/22/1993 | WO1993014181A1 Biodegradable aqueous filter cleaning composition comprising ethoxylated/propoxylated surfactant, carboxylic acid; and solvent |
| 06/24/1993 | WO1993011848A1 Repair of filtration elements for polymer manufacture |
| 06/22/1993 | CA2024948C Grill exhaust system |
| 06/09/1993 | EP0545717A2 Wash liquid distributor |
| 06/08/1993 | US5217659 Repair of filtration elements for polymer manufacture |
| 04/22/1993 | DE4134074A1 Process and assembly to clean loose filter materials used in silo stripper - utilises rotating drum assembly |
| 04/15/1993 | WO1993006913A1 Waste filter purifying device in dry cleaning machine |
| 03/10/1993 | EP0530737A2 Device for separating filter elements |
| 03/03/1993 | EP0529845A1 Device and method for purification of liquids and for cleansing of the filtering material used in the device |
| 02/24/1993 | EP0528359A1 Process for regenerating clogged filters |
| 02/16/1993 | CA2075700A1 Process for regenerating cologged filters |
| 10/21/1992 | CN1065509A Pneumatic device for cleaning air filters |
| 10/20/1992 | US5156660 Filter cleaning apparatus |
| 10/06/1992 | US5152889 Drip pipe for application of wash liquid to filter surfaces |
| 10/01/1992 | DE4109734A1 Single bearing rotating air jet assembly for cleaning filters - in which compressed air is fed to shorter lengths of two diametrically opposed L=shaped jet pipes |
| 09/30/1992 | EP0506171A1 Pneumatic device for cleaning air filters |
| 09/30/1992 | CA2063881A1 Pneumatic device for cleaning air filters |
| 09/29/1992 | US5151186 Method for cleaning filter disks and system therefor |
| 09/24/1992 | DE4109515A1 Breaking used oil filters from motor vehicles - by detaching bottom from housing and sepg. element |
| 09/08/1992 | US5145492 Apparatus for the treatment of filter sludge consisting predominantly of diatomite and method of operating same |
| 09/01/1992 | US5143529 Filter cleaning apparatus |
| 08/04/1992 | US5135580 Filter-washing system |
| 07/28/1992 | US5133105 "V" filter cleaning lance |
| 06/30/1992 | US5125331 Device to crush and extract oil from oil filters |
| 06/14/1992 | WO1992010268A1 Filter cleaning apparatus |
| 06/11/1992 | DE4039068A1 Processing filters contg. e.g. heavy metals - by submerging filter and mechanically or ultrasonically treating while contaminants are removed by suitable precipitating agent |
| 04/30/1992 | WO1992006759A1 A method of washing filters, and filters for liquid filtration |
| 04/07/1992 | US5102538 Apparatus for the treatment of filter sludge consisting predominantly of diatomite and method of operating same |
| 03/11/1992 | CA2050991A1 Procedure for cleaning filter |
| 01/07/1992 | US5078763 Air filter cleaning device |
| 11/19/1991 | CA1292190C Method and system for cleansing a filter bed |
| 09/26/1991 | DE4009552A1 Rotary air jet assembly for cleaning tubular-shaped filters - comprises rotary air filter jets mounted on H-frame secured to central tube rotating on bearings |
| 09/24/1991 | US5051173 Device to remove oil from oil filter |
| 09/04/1991 | CN1054248A Process for preparing water germicide |
| 08/27/1991 | US5042516 Filter washing apparatus |
| 08/27/1991 | CA1288059C Method and system for cleansing a filter bed |
| 05/29/1991 | CN1051680A Apparatus for treatment of filtration slurry mainly consisting of diatomaceous earth, and process for operating same |
| 04/28/1991 | CA2028315A1 Device to crush and extract oil from oil filters |
| 03/28/1991 | DE3935953A1 Treating kieselguhr slurry for filter use |
| 03/28/1991 | DE3935952A1 Treating kieselguhr slurry for filter use |
| 03/27/1991 | EP0418847A1 Plant for processing a filtration slurry containing essentialy diatomaceous earth and process for operating the plant |
| 03/26/1991 | US5001970 Grill exhaust system |
| 12/04/1990 | US4974647 Container for the collection, storage and disposal of new and spent liquids |
| 11/15/1990 | DE3915010A1 Cleaning gas filter, esp motorcycle air filter sponge - with biologically degradable vegetable, animal or synthetic liq. |
| 11/06/1990 | US4967776 Oil filter cleaning system |
| 10/16/1990 | US4962694 Grill exhaust system |
| 08/28/1990 | US4952325 Apparatus and method for cleaning filtered accumulation from an annular filter |
| 07/18/1990 | EP0378412A2 In-situ repair of damaged filter cloths used in solvent dewaxing filters |
| 07/05/1990 | DE3843798A1 Process and plant for regenerating filter elements |
| 07/04/1990 | EP0376106A2 Process and installation for the regeneration of filter elements |
| 06/19/1990 | US4935066 Process for decomposing baked-on grease or oil |
| 03/13/1990 | US4908082 Washing with oil wax solvent, rinsing, drying, applying epoxy adhesive, curing |
| 01/30/1990 | CA1265093A1 Process for cleaning metal filters |
| 01/23/1990 | CA1264678A1 Portable water purification system |
| 12/05/1989 | US4885099 Recovery of dry cleaning solvents from filters; treatment with dry heat, solvent-saturated live steam; reuse |
| 10/04/1989 | EP0335240A2 Process and device for cleaning hollow bodies |
| 09/26/1989 | CA1260361A1 Heavy duty air filter reconditioning system |
| 06/27/1989 | US4842624 Apparatus for cleaning air filters |
| 04/25/1989 | US4823947 Device for packaging, storing and disposing of oil and other products |
| 02/28/1989 | US4808234 Removing dusts from pleated paper media; air jetting interior and exterior; spinning |
| 02/09/1989 | DE3720542C1 Apparatus for opening and dismantling used oil and fuel filter cartridges |
| 11/24/1988 | DE3614238A1 Process for treating effluents contaminated with light substances, in particular saponifiable oils or fats |
| 11/08/1988 | US4782843 Apparatus for cleaning particulate material |
| 11/03/1988 | DE3712719A1 Process for the purification of waste waters contaminated by light materials, in particular saponifiable oils or fats |
| 08/24/1988 | EP0279469A2 Plant for disposing of, removing and reconditioning used oil filters |
| 08/16/1988 | US4764288 Method and system for cleansing a filter bed |
| 07/28/1988 | DE3701346A1 Process for the disposal and use of waste kieselguhr from the beverages industry with the aid of a biological soil/plant filter system |
| 06/28/1988 | US4753257 Arrangement for cleaning of components by a close ultrasonic field, particularly for cleaning of cylindrical filter inserts |
| 04/13/1988 | CN86108262A Method and system for cleaning filter bed |
| 04/06/1988 | EP0262992A1 Improved method and system for cleansing a filter bed |
| 01/20/1988 | EP0253233A2 Regeneration of diatomaceous earth |
| 10/27/1987 | US4702290 Container for collecting oil |