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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7964087 | Methods and systems for forming cooling holes having circular inlets and non-circular outlets A method for forming a hole in an object is provided. The method includes forming a starter hole in the object, providing an electrochemical machining electrode that includes insulation that extends only partially around the electrode, and inserting the electrode in... | 06/21/2011 |
| 7938951 | Methods and systems for forming tapered cooling holes A method for forming holes in an object is provided. The method includes providing an electrochemical machining (ECM) electrode including a first section having insulation that circumscribes the first section, and a second section having insulation that extends only... | 05/10/2011 |
| 7411150 | Method of producing a composite component A composite component (1), such as a turbine airfoil, includes a conductive portion (2), and a non-conductive portion (5), such as a thermal barrier coating or a wear protection coating, or both. In machining the component, a laser machining ste... | 08/12/2008 |
| 7332100 | Process for protectively coating hydraulic microcircuits against agressive liquids, particularly for an ink jet printhead Process for protectively coating against aggressive liquids hydraulic microcircuits made in a resin, particularly for an ink jet printhead, consisting of: disposing of a silicon substrate comprising a sacrificial layer of copper, deposited on the substrate and defin... | 02/19/2008 |
| 7147792 | Method of fabricating inkjet nozzle chambers A method of fabricating inkjet nozzle chambers on a substrate is provided. Each nozzle chamber comprises a roof having a nozzle aperture defined therein and sidewalls extending from the roof to the substrate. The method comprises the steps of: (a) depositing one or ... | 12/12/2006 |
| 7126075 | Electro discharge machining a passage using a backing member A method and apparatus for electro discharge machining a passage through a work piece using a hollow electro discharge machining electrode and a corresponding flushing agent supplied via the hollow electrode. A backing member is positioned abutting the exit face of ... | 10/24/2006 |
| 7104517 | Polymer valves The invention relates to a method of controlling flow of liquids in a micro channel structure. It comprises providing in said micro channel structure plugs (34) of polymer material in said structure, said polymer material in a first state blocking said channe... | 09/12/2006 |
| 7045052 | Method of manufacturing a spectral filter for green and longer wavelengths A method of manufacture for optical spectral filters with omnidirectional properties in the visible, near IR, mid IR and/or far IR (infrared) spectral ranges is based on the formation of large arrays of coherently modulated waveguides by electrochemical etching of a... | 05/16/2006 |
| 7001501 | Method for etching at least one ion track to a pore in a membrane and electrolyte cell for preparing the membrane In an electrolytic cell a membrane consisting of dielectric material such as an organic polymer, which separates two chambers of the electrolytic cell from each other is produced using an etching solution which is provided in one of the chambers, contains active etc... | 02/21/2006 |
| 6805972 | Method of forming nanoporous membranes The present invention is directed to nanoporous metal membranes and methods of making nanoporous metal membranes from metal leaf. At least a portion of the metal leaf is freely supported by a de-alloying medium for a time effective to de-alloy the metal leaf. After ... | 10/19/2004 |
| 6770188 | Part fabricating method A structural body material layer is formed directly on a base substrate or via a sacrificing layer or a peeling layer, a groove is fabricated electrochemically along an outer configuration shape of a part constituting an object at the structural body material layer ... | 08/03/2004 |
| 6762134 | Metal-assisted chemical etch to produce porous group III-V materials A thin discontinuous layer of metal such as Au, Pt, or Au/Pd is deposited on a Group III-V material surface. The surface is then etched in a solution including HF and an oxidant for a preferably brief period, as little as a couple seconds to one hour. A preferred ox... | 07/13/2004 |
| 6680454 | Electromachining with perforated electrodes A perforated electrode has strategically distributed flushing holes through which a flushing medium is discharged. The electrode can be used for either electrochemical machining (ECM) or electrodischarge machining (EDM). The flushing medium is either elec... | 01/20/2004 |
| 6644920 | Method for providing a curved cooling channel in a gas turbine component as well as coolable blade for a gas turbine component A method of forming a curved cooling channel into a gas turbine component such as a turbine blade uses an electrode in the form of a helix. The electrode is driven to rotate around the central rotational axis of the helix and axially along the central rot... | 11/11/2003 |
| 6609297 | Method of manufacturing multilayer printed wiring board A board 20 is provided with a Cu film 30 as a conformal mask, in which are formed a register mark 30b and an opening 3a through which a via hole is formed. A camera senses this register mark 30b so that the position of the board 30 is determined. A laser ... | 08/26/2003 |
| 6558770 | Perforated work piece, and method for producing it A substrate made from silicon has a first region and a second region. Through pores are formed in the first region. Pores that do not traverse the substrate are provided in the second region. The production of the work piece is performed with the aid of e... | 05/06/2003 |
| 6532647 | Manufacturing method of composite type thin-film magnetic head A manufacturing method of a composite type thin-film magnetic head with a reading head element and an inductive writing head element, includes a step of forming the reading head element and its lead conductor layers on a first insulation layer, a step of ... | 03/18/2003 |
| 6423241 | Ink jet print head and a method of producing the same Disclosed is an ink jet print head and a method of producing the same, the ink jet print head including a plurality of ink ejecting orifices which are formed with a desired shape and a uniform size by only once using metal plating technique, having an exc... | 07/23/2002 |
| 6398940 | Method for fabricating nanoscale patterns on a surface A novel method to fabricate nanoscale pits on Au(111) surfaces in contact with aqueous solution is claimed. The method uses in situ electrochemical scanning tunnelling microscopy with independent electrochemical substrate and tip potential control and ver... | 06/04/2002 |
| 6387242 | Method and tool for electrochemical machining A machining process for forming a raised area in a wall of a predrilled hole includes distributing electrolyte via a workpiece internal cavity to a number of predrilled holes. Next, position a template including at least one electrode coated with an insul... | 05/14/2002 |
| 6290461 | Method and tool for electrochemical machining An electrochemical machine is disclosed for use in an electrochemical machining process to simultaneously generate different levels of metal removal. The electrochemical machine comprises at least two electrodes, each including an electrically conductive ... | 09/18/2001 |
| 6290837 | Method for machining slots in molding die An improved method of machining slots and material feed holes in a molding die such as an extrusion die designed to form a honeycomb structure of ceramics employed as a catalyst carrier of a catalytic converter for automotive vehicles. In one of the prefe... | 09/18/2001 |
| 6267868 | Method and tool for electrochemical machining An electrode for use in an electrochemical machining process comprising an outer metal skin of corrosion resistant material, an inner core of conductive material, and an insulating coating disposed on an external surface of the outer metal skin. The exter... | 07/31/2001 |
| 6258240 | Anodizing apparatus and method It is an object of the present invention to provide an anodizing apparatus capable of efficiently performing anodizing. In order to achieve this object, an anodizing apparatus for anodizing a substrate to be processed in an electrolytic solution includes ... | 07/10/2001 |
| 6234752 | Method and tool for electrochemical machining An electrochemical machining process is disclosed for forming multiple raised areas having multiple heights in a wall of predrilled holes within a workpiece. Positioned within each hole is an electrode coated with an insulating material in a pattern defin... | 05/22/2001 |
| 6228246 | Removal of metal skin from a copper-Invar-copper laminate A method of removing a metal skin from a through-hole surface of a copper-Invar-copper (CIC) laminate without causing differential etchback of the laminate. The metal skin includes debris deposited on the through-hole surface as the through hole is being ... | 05/08/2001 |
| 6156188 | Method for making a probe device having detective function A method for making a probe device makes use of the main shaft of an electrodischarge machining machine to mount thereon a probe for effecting the drilling operation of a PCB board. Upon completion of the drilling operation, the probe is severed and then ... | 12/05/2000 |
| 6139716 | Submicron patterned metal hole etching A wet chemical process for etching submicron patterned holes in thin metal layers using electrochemical etching with the aid of a wetting agent. In this process, the processed wafer to be etched is immersed in a wetting agent, such as methanol, for a few ... | 10/31/2000 |
| 6110350 | Method and apparatus for electrochemically deburring a diesel injector nozzle Method and apparatus for electrochemically deburring a diesel injector nozzle workpiece having a gallery cavity and having a first fuel hole and an air hole intersecting the gallery cavity at a first location. A first electrode is inserted into the first ... | 08/29/2000 |
| 6110332 | T-load microchannel array and fabrication method A three-dimensional (3-D) T-load for planar microchannel arrays for electrophoresis, for example, which enables sample injection directly onto a plane perpendicular to the microchannels' axis, at their ends. This is accomplished by forming input wells tha... | 08/29/2000 |
| 6103094 | Method for controlling electrochemical drilling In the electrochemical drilling of a hole completely through a workpiece, the present invention proposes operating the power supply in a current regulating mode. Initially, a hollow cathode is positioned adjacent to a workpiece in which one or more holes ... | 08/15/2000 |
| 6004450 | Process for forming a porous silicon member in a crystalline silicon member Fabrication and use of porous silicon structures to increase surface area of heated reaction chambers, electrophoresis devices, and thermopneumatic sensor-actuators, chemical preconcentrates, and filtering or control flow devices. In particular, such high... | 12/21/1999 |
| 5997713 | Silicon etching process for making microchannel plates An element with elongated, high aspect ratio channels such as microchannel plate is fabricated by electrochemical etching of a p-type silicon element in a electrolyte to form channels extending through the element. The electrolyte may be an aqueous electr... | 12/07/1999 |
| 5997720 | Method for machining extrusion dies In a metal honeycomb extrusion die which incorporates apertures for the conveyance of extrudable material through the die body toward a discharge opening in the face of the die, the aperture sidewalls are shaped by electrochemical machining or the like to... | 12/07/1999 |
| 5965005 | Mask for porous silicon formation The present invention provides a method for forming porous silicon, which includes the steps of: a) providing a silicon substrate; b) growing a GaAs layer on the silicon substrate; c) defining a pattern for the GaAs layer by a photolithography process and... | 10/12/1999 |
| 5935410 | Process and device for the lighting-supported structuring of porous silicon A process for producing a structured area of porous silicon on a substrate, in which silicon is etched and structured by means of illumination, includes selectively aiming the illumination during or after the formation of the porous silicon directly at a ... | 08/10/1999 |
| 5904831 | Method of electrochemically machining workpieces The invention relates to a method of forming one or more through-holes in a metal workpiece, such as shaving foils or shaving combs, by means of an electrochemical machining apparatus (ECM apparatus). To this end, the method is characterized in that, duri... | 05/18/1999 |
| 5865983 | Process for forming honeycomb extrusion die Honeycomb extrusion dies for the extrusion of honeycomb ceramics of high cell density and reduced cell wall thickness are machined from fully consolidated powder-formed (P/M) stainless steels, providing dies with reduced feed hole roughness, improved feed... | 02/02/1999 |
| 5853561 | Method for surface texturing titanium products The present invention teaches a method of producing a textured surface upon an arbitrarily configured titanium or titanium alloy object for the purpose of improving bonding between the object and other materials such as polymer matrix composites and/or hu... | 12/29/1998 |
| 5820744 | Electrochemical machining method and apparatus Electrochemical machining (ECM) techniques utilizing real-time parameter monitoring, alarms and feedback control for improved machining of a workpiece are disclosed. The ECM device utilizes one or more cathodes, an electrolyte and a positively charged wor... | 10/13/1998 |
