| Patents for B01D 24 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (8,047) |
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| 01/20/1981 | US4246102 Water treatment by precipitation filtration and flocculation |
| 12/23/1980 | US4240911 Tower filters with reversed water-jet filter regeneration |
| 12/10/1980 | EP0019658A1 Filtration apparatus for water treatment |
| 12/10/1980 | EP0019657A1 Filter nozzle for filtration devices |
| 12/10/1980 | EP0019656A1 Backwash filtration device |
| 12/10/1980 | EP0019655A1 Device for the temporary fixation of drain-pipe connecting parts in concrete during the casting of the bottom wall of a filterbed |
| 12/09/1980 | US4238335 Undersea sand filter for cleaning injection water |
| 12/09/1980 | CA1091164A1 Process and apparatus for cleaning particulate filters |
| 12/02/1980 | CA1090712A1 Multibed filter backwashed by movable isolation hood |
| 11/11/1980 | US4233158 Liquid treatment tank having a volume compensating structure for use with volume variable liquid treatment material |
| 11/04/1980 | US4231870 Process for regeneration of a filter medium |
| 10/28/1980 | US4230575 Uniform distribution of a liquid over a filter surface |
| 10/21/1980 | US4229292 Countercurrent liquid-solid contacting apparatus |
| 10/15/1980 | EP0016806A1 Oil reconditioning filter. |
| 09/23/1980 | US4224147 Filter apparatus for removing contaminants from a fluid stream having improved withdrawal means for spent adsorbent |
| 09/16/1980 | US4222877 Utilization of non-woven fabrics in water treatment |
| 09/16/1980 | US4222876 Underdrain filter system |
| 09/02/1980 | US4220536 Apparatus for filtering liquids |
| 09/02/1980 | US4220530 Fish tank filter |
| 08/26/1980 | US4219420 Arrangement for and a process of filtering a contaminated medium |
| 08/19/1980 | CA1084182A1 Method for separating pollutants from liquid |
| 08/19/1980 | CA1083976A1 Method and apparatus for the filtration of a suspension or emulsion |
| 07/29/1980 | US4214992 Water collecting and distributing apparatus disposed in a lower portion of high speed filter basin |
| 07/15/1980 | US4212846 Breathing apparatus chemical canister with dust seal |
| 07/08/1980 | US4211656 Liquid treating system |
| 07/08/1980 | US4211655 Upflow filter construction |
| 07/01/1980 | US4210537 Liquid treatment apparatus |
| 06/24/1980 | US4209401 Filter drier |
| 06/24/1980 | CA1080132A1 Graduated particulate backwashable filter medium |
| 06/17/1980 | US4208288 Filtering apparatus |
| 06/11/1980 | EP0011978A1 Improved household water filter |
| 06/03/1980 | US4206055 Household water filter |
| 05/28/1980 | EP0011319A1 Filter plant |
| 05/27/1980 | CA1078304A1 Fluid distributor |
| 05/20/1980 | CA1077724A1 Apparatus for filtering metal melts |
| 05/13/1980 | US4202768 Backwash water recycling system |
| 04/29/1980 | US4200536 Underdrain for filter tanks |
| 04/15/1980 | US4198301 Filter apparatus using floating filter medium |
| 04/08/1980 | US4197205 Deep bed filter |
| 04/01/1980 | US4196079 Air scouring and backwashing |
| 04/01/1980 | CA1074927A1 Liquid treatment apparatus |
| 03/25/1980 | CA1074237A1 Baffle and wash trough assembly for granular-media filters |
| 03/11/1980 | CA1073366A1 Filtration system and flow control method therefor |
| 03/11/1980 | CA1073333A1 Apparatus for tensioning and locking hooping bands |
| 03/04/1980 | US4191652 Apparatus for filter backwashing |
| 02/26/1980 | US4190534 Waste water filtration and sludge removal system |
| 02/26/1980 | US4190533 Filter method |
| 02/21/1980 | WO1980000222A1 Oil reconditioning system |
| 02/05/1980 | US4187175 Treatment facility with backwash control system |
| 02/05/1980 | US4187136 Method of making a graduated density liquid filter element |
| 12/11/1979 | US4178249 Used for purification |
| 11/13/1979 | US4174282 Precoated filters for ultrapure water for steam gneration of electicity |
| 10/17/1979 | EP0004724A2 Coalescing method and apparatus and purified products obtained therewith |
| 10/02/1979 | US4169793 Tank drain assembly for swimming pool filters |
| 09/11/1979 | US4167482 Filtering method and apparatus |
| 08/28/1979 | US4166037 Water treatment |
| 08/28/1979 | US4166036 Floating skimming apparatus |
| 08/22/1979 | EP0003607A2 Regeneration of granular material contained in a column |
| 08/22/1979 | EP0003523A1 Aquarium filter with several filtration compartments |
| 07/31/1979 | US4162979 Device for the chemical and/or physical treatment of liquids |
| 07/24/1979 | US4162216 Process for removal of suspended solids from liquid |
| 07/24/1979 | US4161963 Liquid treatment apparatus |
| 07/24/1979 | CA1059037A1 Apparatus for treating liquids with double-wall bed-supporting bottom |
| 07/11/1979 | EP0002858A1 Sanitation process and apparatus for continually overloaded water treatment plants |
| 06/12/1979 | US4157962 Filtration method and apparatus |
| 06/12/1979 | US4157959 Fluidized portion of bed is progressively increased during course of filtration by means of a perforated plate |
| 05/15/1979 | USRE29996 Upflow filter |
| 05/15/1979 | US4154677 Automatic control of a filter bed wash process |
| 05/01/1979 | US4152266 Filter for treatment of natural and waste water |
| 05/01/1979 | US4152265 Filter apparatus |
| 04/10/1979 | US4148727 Water treatment |
| 04/10/1979 | CA1052287A1 Stacked parallel filters |
| 03/27/1979 | CA1051358A1 Bottom structure for liquid treating apparatus |
| 03/21/1979 | EP0001183A1 Filter |
| 03/06/1979 | CA1049702A1 Sewage system with reusable flush medium |
| 02/27/1979 | US4141824 Tangentially fed upflow sand filter method and apparatus |
| 02/13/1979 | US4139473 Upwash, upflow |
| 01/23/1979 | CA1046947A1 Rotary filter wash distributor |
| 01/09/1979 | US4133766 Granular |
| 11/28/1978 | US4127487 Filtration system |
| 11/28/1978 | US4127485 Vacuum filter for swimming pools |
| 10/03/1978 | US4118322 Filtering apparatus for liquids |
| 10/03/1978 | US4118320 Method and apparatus for agitating and scrubbing filter bed |
| 09/26/1978 | US4116840 Liquid treatment apparatus |
| 09/19/1978 | US4115266 Aggragation |
| 09/19/1978 | US4115265 Vacuum filters |
| 09/12/1978 | US4113613 Catalytically triggered decomposition releasing a gas |
| 09/12/1978 | US4113612 Spontanerous, catalytically triggered decomposition releasing a gas |
| 08/15/1978 | US4107044 Method of and apparatus for purifying fluids with radioactive impurities |
| 08/08/1978 | US4105555 Multi-port valve |
| 08/01/1978 | US4104163 Sodium hydroxide solution |
| 07/25/1978 | US4102790 Filter underdrain |
| 07/25/1978 | US4102786 Method for cleaning of filter device |
| 07/04/1978 | US4098695 Filter cartridge |
| 06/20/1978 | US4096068 Cast beams for filterbed with cross flow at ends |
| 06/13/1978 | US4094790 Distributor collector assembly |
| 06/06/1978 | US4093548 Liquid filter apparatus |
| 05/02/1978 | US4087080 Apparatus for filtering metal melts |
| 04/18/1978 | US4084750 Nozzle assembly for filters |
| 04/04/1978 | US4082664 Filter and method |