| Patents for B01D 29 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups; filtering elements therefor (33,527) |
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| 07/07/1981 | US4277339 Paint pigment skimmer |
| 07/07/1981 | US4277338 Filter assembly |
| 07/07/1981 | US4277337 Deposit filtering apparatus for filtering turbid liquids |
| 07/07/1981 | US4277336 Cleaning solvents |
| 07/07/1981 | US4276822 Apparatus for the batch filtering of suspensions |
| 06/30/1981 | US4276171 Water filter having spiral casing |
| 06/30/1981 | US4276167 Washer and/or thickener |
| 06/30/1981 | US4276166 Filter apparatus and a method of cleaning filter elements thereof |
| 06/30/1981 | US4276163 Hydrostatic relief valve |
| 06/30/1981 | US4276159 Apparatus for screening paper fiber stock |
| 06/26/1981 | EP0023491A4 Filter thermal bypass valve. |
| 06/23/1981 | US4274961 Pressure filter |
| 06/23/1981 | CA1103753A1 Electrically grounded filter plate |
| 06/16/1981 | US4273656 Filter for fluid passage |
| 06/16/1981 | US4273651 Return line filter |
| 06/16/1981 | CA1103172A1 Cartridge filter |
| 06/10/1981 | EP0030077A1 Slide filter apparatus for filtering contaminants from a fluid working material |
| 06/10/1981 | EP0029824A1 Method and apparatus for determining both water-insoluble and water-soluble plant fibre components in plant material |
| 06/09/1981 | US4272368 Fluid filter and indicator |
| 06/09/1981 | US4272318 Apparatus for making filter elements for gas or liquid |
| 06/09/1981 | CA1102713A1 Reverse flushing filter device |
| 06/09/1981 | CA1102712A1 Plate type filter apparatus |
| 06/09/1981 | CA1102658A1 Filter element shutoff valve |
| 06/09/1981 | CA1102604A1 Method and an apparatus for treating fibre suspensions |
| 06/09/1981 | CA1102583A1 Side stream monitoring |
| 06/03/1981 | EP0029468A1 Back-wash filter assembly |
| 06/02/1981 | US4271025 Radial flow-through |
| 06/02/1981 | US4271024 Liquid filter |
| 06/02/1981 | US4271020 Valve for filter device |
| 06/02/1981 | US4271019 Filter unit for use in liquid purification apparatus |
| 06/02/1981 | US4271018 Backwashable fluid filters |
| 06/02/1981 | US4271015 Water treatment apparatus |
| 06/02/1981 | CA1102250A1 Fluid purification system |
| 06/02/1981 | CA1102120A1 Apparatus for the filtration of molten metal in a crucible type furnace |
| 05/27/1981 | EP0029235A1 An ash disposal system for ash discharged from a coal-fired combustion chamber |
| 05/26/1981 | US4269707 Apparatus and method |
| 05/19/1981 | US4268391 Leak proof filter plate system for slide plate filters |
| 05/19/1981 | US4268390 Storm drain sump filter |
| 05/19/1981 | US4268387 Filtration system |
| 05/19/1981 | CA1101339A1 Slide filters |
| 05/12/1981 | US4267060 Travelling sheet, flat-bed vacuum filter and method |
| 05/12/1981 | US4267045 Labyrinth disk stack having disks with integral filter screens |
| 05/12/1981 | US4267043 Immiscible liquid separating |
| 05/12/1981 | US4267039 In which filter is precoated with a particulate material |
| 05/12/1981 | US4267035 For screening pulps |
| 05/12/1981 | US4266412 Filtering device for dry cleaning |
| 05/05/1981 | US4265771 Alluvial filter candle apparatus and a method of cleaning the same |
| 05/05/1981 | US4265762 Filter assembly for use in the filtration of medical treatment liquids |
| 05/05/1981 | US4265756 Change device for sieves for filtering plastic materials |
| 05/05/1981 | US4265751 External biological aquarium filter |
| 05/05/1981 | US4265750 Bar screen filtering device |
| 05/05/1981 | CA1100445A1 Rotating broadcaster and spray spider for bowl shaped screens |
| 04/28/1981 | US4264452 Pump seal flush |
| 04/28/1981 | US4264446 Strainer screen |
| 04/28/1981 | US4264445 Pressurized filter |
| 04/28/1981 | US4264443 Transmission fluid filter |
| 04/28/1981 | US4263843 Method and apparatus for controlled removal of excess slurry from organic foam |
| 04/21/1981 | US4263140 In-line fluid filter |
| 04/21/1981 | US4263139 Filter element |
| 04/21/1981 | US4262744 Molded fittings and methods of manufacture |
| 04/21/1981 | CA1099647A1 Tubular filter elements with improved side seam seal |
| 04/14/1981 | CA1099216A1 Method and apparatus for treating liquid-containing substance mixtures, particularly fibre suspensions |
| 04/08/1981 | EP0026261A1 Device for separating cleaning bodies from a fluid flowing out of a shell-and-tube heat exchanger |
| 04/07/1981 | US4260488 Device for compacting and draining fluid sludges containing fibrous materials |
| 04/07/1981 | US4260350 Filter for high viscosity liquids |
| 04/07/1981 | US4260016 Self-cleaning helical spring sand screen |
| 04/07/1981 | US4260012 Locomotive engine coolant filter |
| 04/07/1981 | CA1098841A1 Tube pressure filters |
| 04/07/1981 | CA1098840A1 Concave resin-shielded filter element for a rotatable disc filter |
| 03/31/1981 | US4259567 Positive reset safety control circuit for frying apparatus |
| 03/31/1981 | US4259283 Manufacture of a sieve having substantially plane sieve sheets |
| 03/31/1981 | US4259188 Fluid filter housing and filter bag seal |
| 03/25/1981 | EP0025628A2 Filter for liquids with automatic cleaning of the filtration element |
| 03/24/1981 | US4257901 Cleanable filter and method of cleaning same |
| 03/24/1981 | US4257894 Filter core extender and seal |
| 03/24/1981 | US4257888 Cartridge filter |
| 03/18/1981 | EP0025310A1 Pressurized rotary screening apparatus |
| 03/18/1981 | EP0025030A1 Regeneration process of a filtering apparatus and device for implementing such process |
| 03/17/1981 | US4256584 Injection molding filter assembly |
| 03/17/1981 | US4256581 Apparatus for preparing granular material by means of a strip caster |
| 03/17/1981 | US4256579 Filter for liquids |
| 03/17/1981 | US4256474 Filter housing and filter assemblies utilizing the same |
| 03/11/1981 | EP0024601A1 Microfiltration device for filtering blood coagels and microaggregates |
| 03/11/1981 | EP0024514A1 Filter arrangement for the filtration of liquids, especially lubricating oil |
| 03/10/1981 | CA1097229A1 Filter housing |
| 03/10/1981 | CA1097228A1 Water purifier with bypass |
| 03/03/1981 | US4253967 Defoaming and recycling during surgery |
| 03/03/1981 | US4253962 Non-destructive vibratory cleaning system for reverse osmosis and ultra filtration membranes |
| 03/03/1981 | US4253959 Liquid filter vessel |
| 03/03/1981 | US4253955 Liquid-solids separator |
| 03/03/1981 | US4253952 Weed screen and trash eliminator |
| 03/03/1981 | US4253228 Apparatus and system for forming wound filters |
| 03/03/1981 | CA1096900A1 Oil pump inlet screen assembly |
| 02/24/1981 | US4252641 Pressurized screen |
| 02/24/1981 | US4252640 Apparatus for sorting fibrous stock suspensions |
| 02/24/1981 | US4252591 Corrugating apparatus and process |
| 02/24/1981 | CA1096318A1 Apparatus for mounting and holding filter bags and the like |
| 02/24/1981 | CA1096315A1 Filter apparatus |
| 02/18/1981 | EP0024041A1 Filter device with solids conveyor |
| 02/17/1981 | US4251374 Interchangeable filter apparatus |