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| Number | Title | Issue Date |
| 4196027 | Method of making filter elements for gas or liquid A filter element for gas or liquid comprises a layer of glass, ceramic, metal, mineral wool or organic fibres containing, wholly within the layer, an apertured sheet, for example of steel or aluminum, the fibres being bound to one another throughout the l... | 04/01/1980 |
| 4193683 | Method and apparatus for filtering developing liquid in a photocopier A photocopy machine and method where working solution flows down from a transfer drum into a trough-type filter and is then filtered as it flows into the main portion of a tank for subsequent recirculation over the transfer drum. The filter trough is pref... | 03/18/1980 |
| 4186100 | Inertial filter of the porous metal type A porous filter is formed of sintered metal particles and is characterized by having sintered metal particles of relatively large size throughout and a thin subsurface area adjacent the upstream surface containing sintered metal particles of relatively sm... | 01/29/1980 |
| 4175153 | Inorganic anisotropic hollow fibers Essentially inorganic monolithic hollow fibers having a radially anisotropic internal void volume wall structure. Process for the production of such fibers. Apparatus and processes using such fibers.... | 11/20/1979 |
| 4154689 | Filtering and inline degassing of molten metal The disclosure teaches an improvement in the filtration of molten metal especially aluminum using a removable vertically disposed filter plate and at least one fluxing gas inlet positioned in such a manner so as to introduce fluxing gas into the filter pl... | 05/15/1979 |
| 4133379 | Foraminous screening device and method for making same A foraminous screening device comprising a cylindrically tubular body having a plurality of spaced apart apertures therethrough and including a network of helically shaped ribs. The network includes first and second rib sets both having a plurality of mut... | 01/09/1979 |
| 4127730 | Method of preparing polymers analogous to enzymes A non-swellable three-dimensional polymer having a component which is a residue of an optically active compound, which residue is chemically removable from said polymer to leave behind in the physical structure of said polymer a void corresponding to the ... | 11/28/1978 |
| 4126499 | Method of manufacture of a rigid, perforated cloth A method for manufacturing a rigid, perforated cloth wherein the cloth is woven, in both the warp and weft directions of core yarns wrapped with a thermoplastic covering yarn. After weaving, the cloth is subjected to heating at a temperature greater than ... | 11/21/1978 |
| 4126560 | Filter medium Disclosed is a filter medium for removing contaminants, including gels, from molten polymers. The medium contains layers of sintered metal fibers having diameters of 50 microns or less. At least two adjacent layers are separated by a screen, and the scree... | 11/21/1978 |
| 4122015 | Fortified metal filter and its preparative procedure A fortified metal filter possessing a high filtering efficiency, a large pore ratio and a wide net area of fused parts of fine stainless steel wires is prepared by crushing the edges of these wires. The wires utilized in the system are composed of numerou... | 10/24/1978 |
| 4113241 | Apparatus for the filtration of molten metal in a crucible type furnace An improved apparatus for the filtration of molten metal for use in the production of castings is disclosed in which a ladling crucible provided with a ceramic foam filter is employed in a furnace type crucible to remove impurities.... | 09/12/1978 |
| 4111863 | Method of preparing polymers analogous to enzymes A non-swellable three-dimensional polymer having a component which is a residue of an optically active compound, which residue is chemically removable from said polymer to leave behind in the physical structure of said polymer a void corresponding to the ... | 09/05/1978 |
| 4105548 | Separation device of rigid porous inorganic hollow filament and use thereof A three-dimensional network of rigid, porous hollow filament of inorganic material is provided which has high flux capability in treating fluid for separation purposes. The network is made by coating a continuous combustible core with a paste of the inorg... | 08/08/1978 |
| 4096924 | Oiler assembly An oiler assembly is disclosed for feeding a relatively precise and consistent lubrication. The assembly includes a supply of the lubricant and a flow line placing the supply in communication with the lubrication point. A metering valve is interposed in t... | 06/27/1978 |
| 4088576 | Method of manufacture of tubular inertial filter A porous isopermeable tubular inertial filter with a large pore size has a slurry of fine particles flowed through it while an effluent is withdrawn through a jacket disposed about it until a thin inner layer of pores become clogged by the fine particles.... | 05/09/1978 |
| 4081371 | Filtering of molten metal The disclosure teaches an improvement in the filtration of molten metal, especially aluminum, using a removable filter plate. The filter plate is provided with a bevelled peripheral surface mating with a like bevelled surface in a filter chamber so that t... | 03/28/1978 |
| 4072616 | Filter cartridge A filter cartridge comprises a body of sintered material having a star-shaped profile and a substantially constant wall thickness. The body has a folded or corrugated configuration with the corrugations extending longitudinally parallel to the axis or alo... | 02/07/1978 |
| 4021354 | Pressure filter A filter for use with sterile slurries or the like comprises a filter basket and means for suspending the filter basket inside a housing, the suspending means for the basket including a sealing O-ring. The O-ring is disposed so that it never comes into co... | 05/03/1977 |
| 3984044 | Retention means for mechanical separation and process of making same A sintered filter element for mechanically separating suspended matter from a liquid or gaseous fluid medium to clarify same, comprising at least two laminated, porous, plate-like filter structures having relatively large planar front and rear surfaces jo... | 10/05/1976 |
| 3980445 | Method of making filtering metal material A method of making filtering material from powdered steel whereby said powdered steel is cold rolled into strip and the latter undergoes a two-stage sintering process. The material produced by this method is intended for filtering fluids such as liquid fu... | 09/14/1976 |
| 3976529 | Method of sealing filter in tubular fitting for medical injection equipment and the like A cylindrical, cup-shaped, porous, sintered powdered metal filter is sealed in a tubular thermoplastic fitting (e.g., the needle-retaining hub of a hypodermic needle or an adaptor or a connector in the line of an intravenous infusion set) by force-fitting... | 08/24/1976 |
| 3962081 | Ceramic foam filter The disclosure teaches an improved ceramic foam filter particularly useful for filtering molten metal, and also a method for filtering molten metal. The filter is characterized by a combination of properties which makes it particularly suitable for use in... | 06/08/1976 |
| 3947363 | Ceramic foam filter The present invention resides in an improved, high temperature resistant ceramic foam filter particularly useful for filtering molten metal, and also an aqueous slurry for use in preparing same.... | 03/30/1976 |
| 3939079 | Filter medium which permits increased amount of filtration A filter medium which permits an increased amount of filtration. The filter medium can be prepared by blending 100 parts by weight of aggregate particles, 5-18 parts by weight of an inorganic bonding material having a chemical composition of about 10-50% ... | 02/17/1976 |
| 3933546 | Method for draining water or moisture from substratum for waterproofing layer A method for draining water or moisture from a substratum for a waterproofing layer in buildings comprising applying to the substratum such as concrete or mortar a sintered product of a thermoplastic resin, having a capillary structure comprising numeral,... | 01/20/1976 |
| 3933652 | Process of manufacturing a porous, stainless steel filter element and sealing it in a tubular fitting, and resulting filter An improved filter for medical infusion and injection equipment is manufactured by compacting stainless steel powder particles of an irregular or dendritic shape, in the substantial absence of a binder, to form a porous, self-supporting green article, and... | 01/20/1976 |
