| 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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| 06/16/1987 | US4673502 Fixed filter drum and movable scraper |
| 05/26/1987 | US4668384 Washing unit for cartridge filters and method therefor |
| 04/23/1987 | DE3537138A1 Process and apparatus for cleaning a filter bag |
| 03/31/1987 | CA1219709A1 Cleaner assembly for air filters |
| 03/24/1987 | US4652380 Method of treating the arsenic containing filter media from phosphoric acid purification |
| 03/04/1987 | EP0213000A2 Method and system of cleansing a filter bed |
| 02/18/1987 | CN86104373A Method and system for cleansing a filter bed |
| 02/12/1987 | DE3527690A1 Filter cartridge cleaning apparatus |
| 11/18/1986 | US4623449 Apparatus for the separation of the reusable part from the unusable part of granular form filter material, in particular of granular form activated charcoal, from filter equipment |
| 10/14/1986 | US4617131 Recirculating portion of backwash cleaning fluid |
| 10/07/1986 | US4615811 Chlorotrifluoroethylene by solvent extraction with water and trichlorotrifluoroethane |
| 09/02/1986 | US4609466 For use on sink or countertop |
| 07/08/1986 | US4599173 Cleaning fluid vessel for immersion of cartridge-type filter media |
| 06/17/1986 | US4595509 Passing water contaminated with PCB's through filter bed of nonporous inorganic particles, hydraulically shearing particles to remove PCB's |
| 04/29/1986 | US4585019 Heavy duty air filter reconditioning system |
| 04/15/1986 | US4582077 Arrangement for cleaning of objects by means of a close ultrasonic field |
| 01/10/1986 | CN85102689A Process for deterging the filer candlewick carrying polyester polymers |
| 10/08/1985 | US4545905 Filter backwash water saver and water filter to clean swimming pool filter |
| 09/18/1985 | EP0053115B1 Liquid filtering apparatus |
| 06/18/1985 | US4524139 Process for the compressive regeneration of flexible, porous materials |
| 02/19/1985 | US4500363 Method of extracting perchlorethylene from dry cleaner filter cartridges |
| 01/15/1985 | US4493756 Electrolysis using filter as electrode, then rinsing |
| 01/08/1985 | US4492003 Filter cleaning device |
| 12/27/1984 | EP0129447A1 Process for cleaning metal filters |
| 04/17/1984 | US4443344 Method for recovering solvent |
| 04/17/1984 | US4443341 Filtration, polyurethanes, regeneration, purification |
| 02/21/1984 | CA1162462A1 Filter cleaning system |
| 01/31/1984 | CA1161369A1 Filtration system with bi-flow filter |
| 11/29/1983 | US4417596 Portable apparatus for cleaning re-usable filters |
| 08/24/1983 | EP0086437A2 Process and device for the regeneration by compression of flexible porous materials |
| 08/16/1983 | US4399034 Movable filter bed |
| 06/09/1982 | EP0053115A1 Liquid filtering apparatus. |
| 05/04/1982 | US4328105 Filtration on polyurethane beds |
| 03/24/1982 | EP0048122A2 Filtration system with bi-flow filter |
| 01/26/1982 | US4312764 Filtration system with bi-flow filter |
| 11/10/1981 | US4299245 Filter cleaning system |
| 09/03/1981 | WO1981002393A1 Liquid filtering apparatus |
| 12/30/1980 | CA1092457A1 Powered contaminant evacuator |
| 09/02/1980 | US4220458 Filter apparatus |
| 03/18/1980 | US4193872 Flushing system for reverse osmosis water purification units |
| 06/05/1979 | US4157305 Drying and centrifuging |
| 06/05/1979 | CA1055658A1 Apparatus for cleaning cylindrical air filters |
| 01/10/1978 | US4067749 Apparatus and method for cleaning air filter elements |
| 09/20/1977 | US4049555 Reusable filter apparatus |
| 09/20/1977 | US4048693 Apparatus for regeneration of filters for antidust respirators |
| 12/21/1976 | US3998656 Method and apparatus for cleaning cylindrical air filters |
| 05/25/1976 | US3958296 Air filter cleaner |
| 04/27/1976 | US3953333 Backwashing |
| 01/13/1976 | US3932278 Backwashing sand sewage treatment |