High-efficiency metal membrane element, filter, and process for making
Patent 5487771 Issued on January 30, 1996. Estimated Expiration Date: 
July 27, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 27, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2300048 2309018 3759709 Process of manufacturing a porous, stainless steel filter element and sealing it in a tubular fitting, and resulting filter Process for producing porous nickel bodies Porous ceramic article Coated ceramic structure and method of making same Filter disc Porous metal parts and method for making the same Porous metal bodies InventorAssigneeApplicationNo. 281047 filed on 07/27/1994US Classes:55/523, Ceramic or sintered55/502, Gasket or sealing means55/503, Media within joinable or separable flow line sections419/2, Making porous product419/24, Filaments or fibers419/39Specific pressure or lack or pressure recitedExaminersPrimary: Spitzer, RobertAttorney, Agent or FirmForeign Patent References
International ClassesB01D 046/10C22C 001/04 AbstractA high-porosity metallic membrane element comprising a sintered element having at least about 55% porosity, the sintered element comprising a matrix of substantially interconnected pores, each of the pores being defined by a plurality of dendtritic metallic particles. A preferred form is made from pure nickel, preferably filamentous nickel powder. The high-porosity metallic membrane element, comprising the aforementioned sintered element having at least about 55% porosity, can be sealed within a filter housing to produce a highly porous filter device with a filtered fluid flow path through the metal membrane element. Also disclosed is a method of making the high-porosity metallic membrane element which includes depositing by air-laying techniques a substantially uniform low-density bed of a sinterable dendritic material into a mold suitable for applying compressive force thereto, compressing the low-density bed of sinterable dendritic material to form a green form, and sintering the green form. The present filter devices exhibit superior porosity and face velocities, negligible outgassing and limited particle shedding when compared to the devices of the prior art.Other References
Field of SearchElemental metal or alloy barrierAPPARATUS FOR SELECTIVE DIFFUSION OF GASES (E.G., SEMIPERMEABLE MEMBRANE, ETC.) Ceramic or sintered WITH MEANS SECURING OR RETAINING SEPARATING MEDIA Unit or cohesive sheet-like media in flow line or frame Gasket or sealing means Media within joinable or separable flow line sections Flow line end coupling (e.g., pipe end) Annular unit held between dished or plate-like end members for top and bottom support Making porous product Filaments or fibers Subsequent heat treatment (e.g., annealing, etc.) Consolidation of powder prior to sintering Specific pressure or lack or pressure recited Isostatic or Hydrostatic Isostatic/Hydrostatic pressing | |
