| Patents for B01D 39 - Filtering material for liquid or gaseous fluids (24,884) |
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| 02/06/1991 | CN1011481B Conical element for filtering and separation |
| 02/06/1991 | CN1011480B Filter of depth layer type |
| 02/05/1991 | WO1991005897A1 Fabric having specific structure, its production method and various articles formed by use of said fabric such as clothes |
| 02/05/1991 | US4990473 Sintering in the presence of antimony, evaporating most of the formed Antimony oxide; high strength and heat shock resistance; internal combustion engines, filters |
| 02/05/1991 | US4990181 Aluminide structures and method |
| 02/05/1991 | CA1279795C Oil filters using water-based latex binders |
| 02/03/1991 | CA2021723A1 Process for the manufacture of a filter and the filter then manufactured |
| 01/31/1991 | DE3924341A1 Air purifying filter for encapsulated electronic equipment - has particle filtering layer and adsorbent filter layer via which all air entering equipment passes |
| 01/30/1991 | EP0410733A2 Dust collecting filter cloth |
| 01/30/1991 | EP0410601A2 Composite ceramic material |
| 01/30/1991 | EP0410586A2 Filters |
| 01/30/1991 | EP0410200A1 Porous body for the treatment of gases and/or vapours and/or liquids and process for the production thereof |
| 01/29/1991 | US4988440 Cooking oil filter |
| 01/29/1991 | CA2022186A1 Ceramic material |
| 01/29/1991 | CA2022092A1 Liquid laydown process for metal filters |
| 01/23/1991 | EP0381666A4 Filter cartridge |
| 01/23/1991 | CA2020628A1 Filters |
| 01/22/1991 | US4987024 Battery separator fabric and related method of manufacture |
| 01/22/1991 | US4986914 Filter for protinaceous materials |
| 01/22/1991 | US4986913 Coarse to progressively finer filter layers |
| 01/17/1991 | DE3922910A1 Exhaust gas cleaning unit esp. for diesel engines - has filter tubes of catalytic porous sintered metal |
| 01/17/1991 | DE3922909A1 Monolithic body esp. for diesel exhaust gas treatment - consists of porous sintered metal contg. catalyst |
| 01/16/1991 | EP0408462A2 Filter material for seizure of leukocytes and method for production thereof |
| 01/16/1991 | EP0407566A1 Highly air permeable expanded polytetrafluoroethylene membranes and process for making them. |
| 01/16/1991 | CN2069297U Super-high-molecular polyethylene filter element of air filtrator |
| 01/15/1991 | US4985280 Process for hydrophobization of microbacteria retaining air filter |
| 01/13/1991 | WO1991000770A1 Permeable porous body for treating gases and/or vapours and/or liquids and process for manufacturing it |
| 01/13/1991 | CA2036385A1 Permeable, porous body for the treatment of gases and/or vapors and/or liquids and method of producing it |
| 01/10/1991 | WO1991000133A1 A filter resistant to high temperatures and a method for manufacturing it |
| 01/09/1991 | EP0406680A2 Process for the production of polymeric filters |
| 01/09/1991 | EP0406485A1 A method for the removal of leukocytes from a leukocyte-containing suspension and filter unit for use with the method |
| 01/09/1991 | EP0165940B1 Filter with integral structural framework |
| 01/08/1991 | US4983467 Sintering followed by cold isostatic pressing |
| 01/08/1991 | US4983434 Filter laminates |
| 01/08/1991 | US4983423 Coating, firing, cooling |
| 01/08/1991 | US4983292 Seamless filter bag and method of its manufacture |
| 01/08/1991 | US4983193 Filter and process for the production thereof |
| 01/08/1991 | US4983192 Activated carbon particles fused to fibers of a pile fabric |
| 01/02/1991 | EP0404961A1 Metallic fiber non-woven fabric and its production method |
| 01/02/1991 | EP0373215A4 Porous inorganic membrane with reactive inorganic binder, and method of forming same |
| 01/02/1991 | CA1278533C Polyimide composite filter fabrics |
| 01/01/1991 | US4981591 Cationic charge modified filter media |
| 01/01/1991 | US4981590 Composite ceramic micropermeable membrane, process and apparatus for producing such membrane |
| 01/01/1991 | US4981589 Multi-layer ceramic filter |
| 01/01/1991 | US4981501 Adsorption filter with high air permeability |
| 12/27/1990 | WO1990015654A1 Filter and process for manufacturing filters using material cured by ultraviolet radiation for end caps |
| 12/27/1990 | EP0403840A1 Non-woven material |
| 12/25/1990 | US4980062 Inorganic membrane |
| 12/25/1990 | US4979969 Heat resistant porous support |
| 12/19/1990 | EP0402972A1 Process to avoid the formation of highly condensed aromatic hydrocarbons and dioxines and apparatus for achieving this process |
| 12/19/1990 | EP0402866A2 Organic microfibrilated material for filter |
| 12/19/1990 | EP0402738A2 Nickel foam |
| 12/19/1990 | CN1047796A Nonwoven fibrous web for tobacco filter |
| 12/18/1990 | US4978452 Method for producing wax impregnated filters for investment casting applications |
| 12/17/1990 | WO1990015713A1 Air bag and laminates therefor and processes for making the laminates |
| 12/14/1990 | CA2018867A1 Organic microfibrilated material for filter |
| 12/12/1990 | EP0402060A2 Nonwoven fibrous web for tobacco filter |
| 12/12/1990 | CN1010747B Model of filtering chamber with floating filter medium |
| 12/11/1990 | US4976861 Method for determining the wetting characteristic of a porous medium |
| 12/11/1990 | US4976858 Multilayer;low density nonwoven fabric and high density filter paper |
| 12/11/1990 | US4976760 Open-cell refractory |
| 12/11/1990 | CA1277577C Adsorptive fiber sheet |
| 12/06/1990 | DE3917174A1 Filter material - has a warp unit carrier with electrically conductive yarns passing through both sides of overlaid filter layer |
| 12/04/1990 | US4975191 Slurry of silicon carbide and colloidal silica binder |
| 12/04/1990 | CA1277252C Coalescing filter |
| 12/01/1990 | CA2018015A1 Embossable filter web |
| 11/28/1990 | EP0399730A1 Sorbent filtration device |
| 11/28/1990 | EP0399393A2 Apparatus for the removal by suction of air enriched with gaseous impurities from an area of contaminated soil |
| 11/27/1990 | US4973382 Mixture of fibers with different lengths and derniers |
| 11/27/1990 | CA1276890C Porous filter media and membrane support means |
| 11/22/1990 | EP0398847A2 Air filter for civil and industrial applications |
| 11/22/1990 | EP0398459A1 Filter cartridge |
| 11/20/1990 | US4971769 Filter device for use in heating or incineration plants |
| 11/15/1990 | DE3915010A1 Cleaning gas filter, esp motorcycle air filter sponge - with biologically degradable vegetable, animal or synthetic liq. |
| 11/14/1990 | EP0397403A1 Device and method for depletion of the leucocyte content of blood and blood components |
| 11/14/1990 | EP0397225A1 Filter element for removing dusts from gases |
| 11/14/1990 | CN2065506U Porous ceramic purifier |
| 11/13/1990 | US4970097 Method for forming abrasion resistant coating on fibrous glass substrate |
| 11/13/1990 | US4970035 Process for the production of open pore ceramic bodies and ceramic bodies produced according to this method |
| 11/13/1990 | US4969457 Low density polyethylene layer; gas flow; aids prevention |
| 11/10/1990 | CA2015794A1 Filter element for separating dusts from gases |
| 11/07/1990 | EP0396329A1 Method for reducing fouling |
| 11/07/1990 | EP0344284A4 Porous ceramic shapes, compositions for the preparation thereof, and method for producing same |
| 11/07/1990 | CN1046684A Microporous filtering ceramic using diatomite as substrate |
| 11/06/1990 | US4968533 Method of preparing membranes with low protein adsorbability |
| 11/06/1990 | US4968467 Corrosion resistance |
| 11/06/1990 | US4968425 Filter of depth layer type |
| 10/31/1990 | EP0395331A1 Electret filter material |
| 10/31/1990 | EP0394954A2 Strong nonwoven fabrics from engineered multiconstituent fibers |
| 10/31/1990 | EP0394622A1 Process and device for filtration |
| 10/31/1990 | EP0394384A1 Device for containing and holding in position specific quantities of bulk material. |
| 10/31/1990 | EP0175769B1 Polyethylene molding composition and process |
| 10/29/1990 | WO1990013593A1 A composite, porous diaphragm |
| 10/29/1990 | CA2049327A1 Composite, porous diaphragm |
| 10/26/1990 | CA2015548A1 Electret filter material |
| 10/25/1990 | DE3912948A1 Drainage layer in sintered metal backing for filter - is penetrated by anchoring bores filled with backing material |
| 10/24/1990 | EP0393729A2 Regenerable filter in exhaust gases of an internal-combustion engine |
| 10/24/1990 | EP0393723A2 Deodorants, deodorant sheets, filter sheets and functional papers as well as filtering mediums for exhaust gas |
| 10/24/1990 | EP0393374A2 Manufacturing method of filter element for dust collector |
| 10/24/1990 | EP0263468B1 Ceramic filter membrane and process for the preparation thereof |