Nitrate Containing (e.g., Nitric Acid, Sodium Nitrate, Etc.) Patents (Class 205/685)
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Patent number: 11771566Abstract: A surgical implant and a surgical kit. The surgical implant has a body portion comprising a first hole formed in an exterior surface of the body portion, a second hole adjacent the first hole, and at least one through-hole within the body portion and extending entirely thought a depth of the body portion extending entirely thought a depth of the body portion. The implant has a central opening abutting the body portion and extending through the body portion. The first hole has a first sidewall and a first cavity in the body portion, the second hole has a second sidewall and a second cavity in the body portion, and the first cavity and the second cavity have an interconnected opening there between. The surgical kit includes the surgical implant and an intervertebral insertion device.Type: GrantFiled: June 18, 2021Date of Patent: October 3, 2023Assignee: Zavation Medical Products, LLCInventors: Katie Lynn Motley, John Franklin Cummins, Joseph Matthew Jones, John Lawrence Walker, Colbert Yeates Williams
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Publication number: 20150027903Abstract: The invention relates to a weld cleaning fluid, and method of cleaning weld or discolouration especially on stainless steel. Stainless steel welds, such as those done by TIG welding, require cleaning to remove the resulting surface discolouration and also to passivate the steel. This is often done using an electro-cleaning apparatus with the assistance of electrolyte cleaning fluids. A new cleaning fluid has been developed that has a generally neutral pH, instead of the highly acidic nature of previously used fluids, which avoids environmental and safety issues. The cleaning fluid composition preferably has potassium or sodium orthophosphate salts as the main active ingredient, or similar such salts, and has a pH of around 7. It may also include a sequestering or chelating agent such as a sodium and/or potassium salt of EDTA, and colouring and fragrance.Type: ApplicationFiled: September 14, 2012Publication date: January 29, 2015Applicant: ENSITECH IP PTY LTDInventor: Simon Lewer
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Patent number: 8828258Abstract: A method for surface treatment of a stainless steel separator for a fuel cell comprises preparing a stainless steel sheet containing nickel, chrome and iron, and having a passive film on a surface of the stainless steel sheet, and dipping the stainless steel sheet into a mixed etching solution of nitric acid (HNO3) and sulfuric acid (H2SO4) at a temperature of 50-70° C. for 30 seconds to 30 minutes to selectively lower an amount of Fe in the passive film formed on the surface of the stainless steel sheet.Type: GrantFiled: July 27, 2007Date of Patent: September 9, 2014Assignee: Hyundai HyscoInventors: Yoo Taek Jeon, Yeon Soo Jeong
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Publication number: 20130184833Abstract: Methods and apparatuses of stents with likely reduced rates of tissue perforation are provided. Some embodiments include reducing the profile of a portion of the stent using a wire profile reduction electropolishing bath and/or other wire profile reduction means.Type: ApplicationFiled: October 3, 2012Publication date: July 18, 2013Applicant: Cook Medical Technologies LLCInventor: Cook Medical Technologies LLC
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Publication number: 20120082906Abstract: The present invention relates to A process for producing a transport- and storage-stable sheet-like oxygen-consuming electrode comprising providing an electrically conductive support, a gas diffusion layer, and a layer comprising a silver-based catalyst; coating the support with a silver oxide-containing intermediate; and at least partly electrochemically reducing the silver oxide-containing intermediate in an aqueous electrolyte at a pH of less than 8.Type: ApplicationFiled: October 3, 2011Publication date: April 5, 2012Applicant: Bayer MaterialScience AGInventors: Andreas Bulan, Rainer Weber, Matthias Weis
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Patent number: 7850862Abstract: Textured surface having micro recesses such that the outer surface overhangs the micro recesses. Embodiments of the textured surface include sharp edges for promoting bone deposition and growth within the micro recesses, protrusions of varying depth from the surface that include overhangs, and micro recesses that are at least partially defined by complex ellipsoids.Type: GrantFiled: February 1, 2006Date of Patent: December 14, 2010Assignee: Tecomet Inc.Inventors: Mark Amrich, Jonathan Rolfe, Joseph Buturlia, Robert Lynch
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Publication number: 20090139875Abstract: Disclosed is an electrolyte for electrochemical machining of a metal product, which can reduce a defect of an electro-chemical machining product, increase a lifespan of an electrolyte and an electrode, and improve efficiency of the electrochemical machining. The electrolyte includes an inorganic salt and at least one of a complexing agent and a reducing agent in a solvent.Type: ApplicationFiled: October 3, 2008Publication date: June 4, 2009Inventors: Jong Yun KIM, Seoung Jae Lee, Bae Kyun Kim, Young Tae Kim, Mi Jin Choi
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Publication number: 20080164153Abstract: A polishing pad includes a guide plate having a plurality of holes therein and being affixed to a compressible under-layer; and a plurality of conducting polishing elements each affixed to the compressible under-layer and passing through a sealed contact with a proton exchange membrane and corresponding hole in the guide plate so as to be maintained in a substantially vertical orientation with respect to the compressible under-layer but being translatable in a vertical direction with respect to the guide plate. The polishing pad may also include a slurry distribution material fastened to the guide plate by an adhesive. Pad wear sensors may also be provided in the polishing pad.Type: ApplicationFiled: October 5, 2005Publication date: July 10, 2008Inventor: Rajeev Bajaj
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Patent number: 6923900Abstract: A profiled tube (50b) comprising a high carbon content alloy (greater than 0.3%), superalloy or other high creep strength material, has a fluted bore with internal fins (52b) and intervening valleys or troughs (56b). Such a tube is made by centrifugal casting and subsequent electrochemical machining by drawing of an electrode (104) along the tube while at the same time passing electrolyte along the tube and around the electrode and also applying an electrical current between the tube and electrode, so that material of the tube passes into solution in the electrolyte. The electrode (104) has the same profile as the end-profile required in the tube (80) but has an inclined working face (124). An electrode rod (92) drives the electrode from one end mounting means (82) to another (84), each of which support the tube (80) and supply/exhaust electrolytic solution. The electrolyte is preferably sodium nitrate, although an acid based system is feasible.Type: GrantFiled: June 4, 2001Date of Patent: August 2, 2005Assignee: Doncasters PLCInventors: John Jones, Michael J. Yardley, Terry K Barker
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Patent number: 6866769Abstract: A drive head for a bolt, fastener, coupling, nut or other driveable head made from a less malleable metal such as a powder metal nickel alloy. The drive head has an upper drive portion having at least six convex corners spaced around the outer periphery thereof, each corner terminating in an edge. The drive head also has a lower flange portion adjacent to the drive portion and having an edge extending radially outwardly to at least the edge of each corner. The drive portion and the flange portion of the drive head is formed by subjecting a blank having a generally circular head to electrochemical machining (ECM). A tool is also provided for the ECM method to form the drive portion and flange portion of the drive head.Type: GrantFiled: November 6, 2002Date of Patent: March 15, 2005Assignee: General Electric CompanyInventors: William C. Anderson, Edward I. Stamm, Vicky S. Budinger, Terry L. Lievestro
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Patent number: 6802954Abstract: The present invention is directed to a method of creating porous anode foil for use in multiple anode stack configuration electrolytic capacitors, producing a pore structure that is microscopic in pore diameter and spacing, allowing for increased energy density with a minimal increase in ESR. Initially, an anode metal foil is etched, according to a conventional etch process, to produce an enlargement of surface area. The etched foil is then placed into the electrochemical drilling solution of the present invention. Alternatively, the etched foil may be masked, so that only small areas of the etched foil are exposed, prior to being placed in the electrochemical drilling solution. A DC power supply is used to electrochemically etch the masked or unmasked foil in the electrochemical drilling solution of the present invention such that pores on the order of a few microns diameter are produced through the foil.Type: GrantFiled: July 18, 2002Date of Patent: October 12, 2004Assignee: Pacesetter, Inc.Inventors: Ralph Jason Hemphill, Thomas V. Graham, Thomas F. Strange
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Patent number: 6793799Abstract: A method of separating and recovering useful rare FP contained in spent nuclear fuels (platinum group element (Ru, Rh, Pd), Ag, Tc, Se, Te) selectively and at high recovery percentage is provided. Nitric acid solution to be processed containing useful rare FP in spent nuclear fuels is electrolytically reduced by using Pd2+ or Fe2+ as a catalyst and rare FP are collectively deposited on an electrode and then deposits on the electrode are collectively dissolved by electrolytic oxidation. Then, the deposit-dissolved solution is electrolytically reduced at low current density, medium current density and high current density, successively, whereby Ag.Pd group, Se.Te group and Ru.Rh.Tc group are separately deposited and recovered, group by group. A cooperation system for nuclear power generation and fuel cell power generation can be provided by utilizing the recovered rare FP as electrode materials and production and purification catalysts for hydrogen fuel in fuel cell.Type: GrantFiled: May 30, 2002Date of Patent: September 21, 2004Assignee: Japan Nuclear Cycle Development InstituteInventors: Masaki Ozawa, Yuichi Sano, Yoshihiko Shinoda
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Patent number: 6780305Abstract: The invention provides a method for producing a support for planographic printing plates which comprises a step of roughening the surface of an aluminum plate and in which the surface-roughening step includes (1) a pre-electrolytic surface-roughening step of electrolytically roughening the surface of an aluminum plate in an aqueous hydrochloric acid solution, (2) an alkali-etching step of etching the roughened surface of the aluminum plate with an alkali solution, (3) a desmutting step of contacting the etched aluminum plate with an aqueous sulfuric solution having predetermined sulfuric acid and aluminum ion concentrations at a predetermined temperature for 1 to 180 seconds, and (4) an electrolytic surface-roughening step of processing the desmutted aluminum plate in an aqueous nitric acid solution with an alternating current being applied thereto. The invention enables stable and inexpensive production of planographic printing plate supports even from regenerated aluminum.Type: GrantFiled: February 12, 2002Date of Patent: August 24, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Atsuo Nishino, Yoshitaka Masuda, Hirokazu Sawada, Akio Uesugi
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Patent number: 6719892Abstract: A process for selective removal of a nickel alloy brazing composition from a nickel-base alloy component includes the steps of providing a brazed assembly including nickel-base alloy components joined by nickel alloy brazing composition; immersing the assembly in an electrolyte; and applying a potential across the electrolyte at a magnitude wherein the nickel-base alloy components are electrochemically passive and the nickel alloy brazing composition dissolves whereby the brazing composition is removed from the components.Type: GrantFiled: May 4, 2001Date of Patent: April 13, 2004Assignee: United Technologies CorporationInventors: Mark Jaworowski, Michael A Kryzman
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Publication number: 20040016651Abstract: A method is provided for the manufacture of an implant, in particular of a metallic implant, comprising the steps of roughening the surface of the implant by blasting with blasting particles and of treating the surface with a solvent which selectively dissolves the blasting particles.Type: ApplicationFiled: March 20, 2003Publication date: January 29, 2004Inventor: Markus Windler
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Patent number: 6682645Abstract: In a process for producing an aluminum support of a lithographic printing plate, the desired aluminum support is produced by imparting fine asperities to an aluminum plate and then roughening it electrochemically in an acidic aqueous solution. The roughened aluminum plate may be electropolished or chemically etched.Type: GrantFiled: June 5, 2001Date of Patent: January 27, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Atsuo Nishino, Yoshitaka Masuda, Hirokazu Sawada, Akio Uesugi
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Publication number: 20030234184Abstract: Polishing compositions and methods for removing conductive materials from a substrate surface are provided. In one aspect, a composition includes an acid based electrolyte system, one or more chelating agents, one or more corrosion inhibitors, one or more inorganic or organic acid salts, one or more pH adjusting agents to provide a pH between about 2 and about 10, a polishing enhancing material selected from the group of abrasive particles, one or more oxidizers, and combinations thereof, and a solvent. The composition may be used in an conductive material removal process including disposing a substrate having a conductive material layer formed thereon in a process apparatus comprising an electrode, providing the composition between the electrode and substrate, applying a bias between the electrode and the substrate, and removing conductive material from the conductive material layer.Type: ApplicationFiled: June 6, 2003Publication date: December 25, 2003Applicant: Applied Materials, Inc.Inventors: Feng Q. Liu, Stan D. Tsai, Yongqi Hu, Siew S. Neo, Yan Wang, Alain Duboust, Liang-Yuh Chen
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Patent number: 6627064Abstract: A hard material layer deposited on a hard metal work piece is removed by electrolytic passivation in which a maximum current density equal to at least 0.01 A/cm2 is generated on the work piece at the beginning of the layer removal process. The hard material layer rapidly flakes off without causing substantial damage to the hard metal material located underneath.Type: GrantFiled: October 23, 2000Date of Patent: September 30, 2003Assignee: Unaxis Balzers AktiengesellschaftInventor: Michael Hans
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Patent number: 6596150Abstract: Disclosed is a production method of an aluminum support for a lithographic printing plate, capable of stable and low-cost production of an aluminum support for a lithographic printing plate, the support being scarcely subject to generation of treatment unevenness called streaks or grainy unevenness ascribable to the different in the aluminum dissolving rate due to the difference in the orientation of the crystal grain. The aluminum support is produced by surface graining and then polishing an aluminum plate or by polishing an aluminum plate while etching it in an aqueous acid or alkali solution. The aluminum plate may be subjected to polishing and then to anodization or may be subjected to polishing, to surface graining, again to or not to polishing and then to anodization. A production method for producing a high-quality support for a lithographic printing plate, free of local unevenness is also disclosed.Type: GrantFiled: May 27, 1999Date of Patent: July 22, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Atsuo Nishino, Yoshitaka Masuda, Hirokazu Sawada, Akio Uesugi, Masahiro Endo
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Patent number: 6416650Abstract: An apparatus and method of electrochemical polishing a workpiece with ring-form electrode is provided. A mechanism with a tool electrode, a DC power supply and electrolysis-supply tank of the present invention can be installed on the traditional production equipment. The tool electrode is connected with the negative pole of the DC power supply, while the workpiece is connected with the positive pole of the DC power supply and kept a fixed distance from the tool electrode. The electrode or the workpiece advances at a predetermined feeding speed while the workpiece is electrochemically polished. The present invention uses the centrifugal force of rotational tool electrode to discharge electrolytic byproducts, making electrochemical polishing more effective.Type: GrantFiled: July 27, 2000Date of Patent: July 9, 2002Assignee: National Science CouncilInventor: Cheng-Hong Ho
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Patent number: 6379528Abstract: The back side recessed cooling surface of a shroud defining in part the hot gas path of a turbine is electrochemically machined to provide surface roughness elements and spaces therebetween to increase the heat transfer coefficient. To accomplish this, an electrode with insulating dielectric portions and non-insulating portions is disposed in opposition to the cooling surface. By passing an electrolyte between the cooling surface and electrode and applying an electrical current between the electrode and a shroud, roughness elements and spaces therebetween are formed in the cooling surface in opposition to the insulating and non-insulating portions of the electrode, hence increasing the surface area and heat transfer coefficient of the shroud.Type: GrantFiled: December 12, 2000Date of Patent: April 30, 2002Assignee: General Electric CompanyInventors: Ching-Pang Lee, Robert Alan Johnson, Bin Wei, Hsin-Pang Wang
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Publication number: 20020038767Abstract: Disclosed herewithin is an apparatus for fabricating a stent which involves processing a tubular member whereby no connection points to join the edges of a flat pattern are necessary. The process includes the steps of: a) preparing the surface of a tubular member, b) coating the outside surface of the tubular member with a photo-sensitive resist material, c) placing the tubular member in an apparatus designed to simultaneously rotate the tubular member while passing a specially configured photographic frame negative between a light source and the tubular member, d) exposing the tubular member to a photoresist developer, e) rinsing the excess developer and uncured resist from the exposed tubular member, f) sealing the inner lumen of the tubular member, and g) treating the tubular member with a chemical or electro-chemical process to remove uncovered metal. By modifying the photographic negative, this process can be employed to fabricate a virtually unlimited number of stent designs and configurations.Type: ApplicationFiled: November 1, 2001Publication date: April 4, 2002Inventor: Thomas Trozera
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Patent number: 6315885Abstract: The present invention relates to a method of electropolishing aided by ultrasonic means having the capability of rapidly discharging dregs. More specifically, the invention relates to a method of electrochemical polishing process aided by an auxiliary ultrasonic cleaning device which emits ultrasonic vibrating energy to effectively discharge dregs, shorten the polishing cycle time for each workpiece, and improve the surface roughness of the workpiece. The present invention further provides an electropolishing apparatus that can be easily retrofitted to almost every existing machine tool as an auxiliary unit. Alternately, the ultrasonic apparatus can be installed separately as an independent ultrasonic generating unit.Type: GrantFiled: October 27, 1999Date of Patent: November 13, 2001Assignee: National Science CouncilInventor: Hong Hocheng
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Publication number: 20010027925Abstract: Electrolytic apparatus of support for lithographic printing plate is disclosed that electrolyticaly treats aluminum web in acid electrolyte wherein the guide roller for aluminum web transportation comprises a skeleton section formed with strong material of intenisty, a liquid contact section on the surface of the skeleton section, and nonwoven fabric which is provided on the contact surface with the aluminum web.Type: ApplicationFiled: January 19, 2001Publication date: October 11, 2001Inventors: Atsushi Matsuura, Akio Uesugi
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Patent number: 6214200Abstract: In a method for electrochemical machining, the working distance is set by contacting the workpiece with the electrode, increasing the distance between the workpiece and the electrode by a first distance, detecting whether the contact between the electrode and the workpiece is broken, and further increasing the distance between the workpiece and the electrode by a second distance. Owing to this method, very small working distances can be set with a limited risk of short-circuiting and flash-over.Type: GrantFiled: April 2, 1999Date of Patent: April 10, 2001Assignee: U.S. Philips CorporationInventors: Hermanus S. J. Altena, Maarten Brussee, Anton M. Boorsma, Foppe Kramer
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Patent number: 6139715Abstract: A method and apparatus for deburring or radiusing articles made of TZM alloys by electrochemical machining uses a pulsating current and a binary salt electrolyte solution simultaneously applied across a gap between a tool electrode and a TZM workpiece. The pulse duration is typically in the range between about 0.5 milliseconds to about 100 milliseconds and the pulse interval is between 5 milliseconds and 150 milliseconds. The pulse voltage amplitude is typically in the range between about 8 volts to about 30 volts. The binary salt electrolyte solution is an aqueous salt solution with a total concentration typically in the range between about 14% to about 20% by weight of sodium chloride and sodium nitrate. The ratio of sodium chloride to sodium nitrate is typically in the range of between about 1:1 to about 1.5:1. The standoff distance, or gap, between the tool electrode and the TZM workpiece is typically in the range between 0.015 mm to about 3.0 mm.Type: GrantFiled: November 2, 1998Date of Patent: October 31, 2000Assignee: General Electric CompanyInventor: Bin Wei
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Patent number: 6110351Abstract: A method of machining metal-matrix composite materials using electrochemical machining is provided. The method comprises the steps of: providing a metal matrix composite material in an electrochemical machine, and electrochemically machining the metal-matrix composite material in a nitrate or chloride containing electrolyte at a current density of equal to or greater than approximately 1 A/cm.sup.2. Preferably the metal-matrix composite is comprised of an aluminum alloy or pure Al matrix with ceramic particles, such as silicon carbide.Type: GrantFiled: October 15, 1998Date of Patent: August 29, 2000Assignee: University of HawaiiInventors: Lloyd Hiromi Hihara, Philip Panquites, IV
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Patent number: 6103028Abstract: A new method of creating thin free-standing pin hole-free hydrogen-selective palladium-bearing membranes that comprises thinning cold-rolled membranes by chemical etching or electrochemically electrolyzing of at least one membrane surface, and novel membranes produced thereby and including membranes with selected portions only thereof so thinned.Type: GrantFiled: February 18, 1999Date of Patent: August 15, 2000Assignee: Walter Juda Associates, Inc.Inventors: Walter Juda, Charles W. Krueger, R. Todd Bombard
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Patent number: 5965006Abstract: The invention shows a surface (2) for a metal implant (1) which has a coarse structure of elevations (3) and depressions (4), with the surface (2) being permeated by a network (5) of protruding ribs which form nodes (7) and interstices or meshes (8) having an interstice width of 2 mm to 0.4 mm, while the depressions represent sections of spherical cavities (11). The nodes (7) of the ribs can protrude the furthest like mountain peaks, whereas the ribs (6) which connect two nodes (7) each form a lower lying saddle (10) if the spherical cavities penetrate one another slightly. Through coating with an electrochemically resistant protective lacquer, into which holes can be shot at a predetermined spacing without damaging the metal, with a laser for example, a coarsely structured intermediary surface can be economically provided by means of electrochemical erosion which receives a fine structure through sand blasting.Type: GrantFiled: February 20, 1997Date of Patent: October 12, 1999Assignee: Sulzer Orthopaedie AGInventors: Roland Baege, John Maclaren Cassells, Toby StJohn King, Timothy Andrew Large, Anne Tregoning Miller
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Patent number: 5893967Abstract: An impedance-assisted electrochemical method is employed for selectively removing certain material from a structure without significantly electrochemically removing certain other material of the same chemical type as the removed material.Type: GrantFiled: June 30, 1997Date of Patent: April 13, 1999Assignee: Candescent Technologies CorporationInventors: N. Johan Knall, Christopher J. Spindt, Gabriela S. Chakarova, Duane A. Haven, John M. Macaulay, Roger W. Barton, Maria S. Nikolova, Peter C. Searson
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Patent number: 5863412Abstract: A method for etching an object having a portion to be etched on the surface thereof, comprising a step of immersing said object in an electrolyte solution such that said object serves as a negative electrode; a step of arranging a counter electrode having a pattern corresponding to a desired etching pattern to be formed at said portion to be etched of said object in said electrolyte solution so as to maintain a predetermined interval between said counter electrode and said object, and a step of applying a direct current or a pulse current between said object and said counter electrode to etch said portion to be etched of said object into a pattern corresponding to said pattern of said counter electrode.Type: GrantFiled: October 17, 1996Date of Patent: January 26, 1999Assignee: Canon Kabushiki KaishaInventors: Hirofumi Ichinose, Ippei Sawayama, Akio Hasebe, Tsutomu Murakami, Masaya Hisamatsu, Satoshi Shinkura, Yukie Ueno
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Patent number: 5833835Abstract: Method of electrochemically machining an electrically conductive workpiece (2) in an electrolyte by applying bipolar electric pulses between the workpiece (2) and an electrically conductive electrode (6), one or more current pulses of normal polarity alternating with voltage pulses of opposite polarity. The amplitude (Un) of the voltage pulses is adjusted between two predetermined values (Un1, Un2) derived from the occurrence of a given surface quality of the workpiece (2) and the occurrence of wear of the electrode (6). The derivation is effected by means of at least one test which precedes the machining of the workpiece (2). During the test the amplitude (Un) of the voltage pulses is increased gradually from an initial value to a final value. The two predetermined values (Un1, Un2) are determined upon the occurrence of a sign reversal in the difference between successive values of a parameter which is representative of a property of a gap (5) between the electrode (6) and the workpiece (2).Type: GrantFiled: July 12, 1996Date of Patent: November 10, 1998Assignee: U.S. Philips CorporationInventors: Nasich Z. Gimaev, Aleksandr N. Zajcev, Aleksandr L. Belogorskij, Igor L. Agafonov, Naila A. Amirchanova, Viktor N. Kucenko, Rafail R. Muchutdinov
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Patent number: 5824206Abstract: Photoelectrochemical etching of p-InP in various nitric acid solutions demonstrates that the semiconductor undergoes etching with favorable etch rates in the negative potential region. The etch rate increases with decreasing potentials to -1.0 V and exhibits a slight decrease with lower potentials. Etch rates exhibit a linear relation with relative light intensity. The values of etch rate for p-InP polarized at -1.0 V vary from 0.07 to 1.24 .mu.m/min. for HNO.sub.3 solutions with concentrations ranging from 1.0 to 5.0 M. Etch rates determined in the 4 M acid range were reproducible within 4%. With acid concentrations greater than 5 M, the etch rates were observed to be inconsistent. XPS studies indicated that these inconsistencies are probably due to the formation of organic nitrogen compounds on the surface of p-InP.Type: GrantFiled: June 28, 1996Date of Patent: October 20, 1998Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Kenneth P. Quinlan
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Patent number: 5733433Abstract: A heat generating type ink-jet print head including an ink supply passage for receiving an ink from an ink container, a micro chamber for storing the ink and nozzles, all being directly formed on a substrate, and a method for fabricating the ink-jet print head using an electrolytic polishing process, and a method for fabricating the ink-jet print head. The ink-jet print head is fabricated using an electrolytic polishing process, thereby achieving an accurate and inexpensive fabrication.Type: GrantFiled: June 7, 1995Date of Patent: March 31, 1998Inventors: Ho Jun Lee, Hi Deok Lee, Jae Duk Lee, Jun Bo Yoon, Ki Ho Han, Jae Kwan Kim, Chul Hi Han, Choong Ki Kim, Doo Won Seo
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Patent number: 5650059Abstract: A carbide substrate including a binder prepared to receive a cutting material such as a diamond coating thereon. The substrate is immersed in an electrolyte solution with the substrate acting as the anode thereby providing for an electro-polished substrate surface. The electro-polished substrate surface is then etched to substantially remove the binder phase of the carbide substrate, the etching being to a depth of up to about 15 microns. The resulting surface is susceptible for receiving a coating of the diamond cutting material.Type: GrantFiled: August 11, 1995Date of Patent: July 22, 1997Assignee: Credo Tool CompanyInventors: Carl Shumaker, Zane D. Lockhart, Jr., Oscar H. Miller
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Patent number: 5518589Abstract: A method of producing a support for a planographic printing plate which comprises roughening a surface of an aluminum plate electrochemically, etching the surface by 0.01 to 20 g/m.sup.2 with alkali, and roughening the surface electrochemically in an electrolytic solution containing hydrochloric acid and/or a water-soluble hydrochloride salt which forms hydrochloride ion or nitric acid and/or a water-soluble nitrate salt which forms nitrate ion as the principle component.Type: GrantFiled: August 31, 1994Date of Patent: May 21, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Atsushi Matsuura, Akio Uesugi
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Patent number: 5516401Abstract: An electrolyte is circulated between the surface to be machined, raised to an anode potential, and a tool electrode (9') raised to a cathode potential. The electrolyte contains lithium nitrate as a unique active product with a concentration of between 20 g/l and 2350 g/l and preferably between 50 g/l and 250 g/l. The process can be applied to the machining of the surface of any metallic component and in particular to the machining of the internal surface of tubular components (5) such as penetrations in the vessel bottom or closure head of a nuclear reactor; in this case the electrochemical machining cell consists of a cylindrical tool electrode (9') placed inside the component to be machined.Type: GrantFiled: July 7, 1994Date of Patent: May 14, 1996Assignee: FramatomeInventors: Pierre Guillermier, Alain Blocquel
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Patent number: 5507924Abstract: Disclosed herein are methods of measuring, adjusting and uniformalizing a sectional area ratio of a metal-covered electric wire, a method of cleaning an electric wire, a method of manufacturing a metal-covered electric wire, an apparatus for measuring a sectional area ratio of a metal-covered electric wire, and an apparatus for electropolishing a metal-covered electric wire.Electric resistance values of first and second materials are previously stored respectively so that a sectional area ratio of a metal-covered electric wire is calculated on the basis of the as-stored values and an actually measured electric resistance value of the metal-covered electric wire. Measurement and uniformalization of a sectional area ratio of a metal-covered electric wire and cleaning of an electric wire are carried out by dissolving surface layer parts of the electric wires by electropolishing.Type: GrantFiled: January 31, 1994Date of Patent: April 16, 1996Assignee: Sumitomo Electric Industries, Ltd.Inventors: Akira Mikumo, Kenichi Takahashi, Masanobu Koganeya
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Patent number: 5503718Abstract: A method of etching an aluminum foil for electrolytic capacitors, comprising the steps of electrolytically etching an aluminum foil for electrolytic capacitors that has a high cubic texture in an electrolyte containing a chloride to form pits, and enlarging the pits formed in the above step by etching, in which step of forming pits the current density is increased from 0 to a maximum value quickly and then is decreased gradually.Type: GrantFiled: February 22, 1995Date of Patent: April 2, 1996Assignee: Nihon Chikudenki Kogyo KabushikiInventor: Kaoru Kakizakai
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Patent number: 5500101Abstract: The present invention relates to a method of etching aluminum foil for electrolytic capacitors that is improved in etching efficiency, wherein when the aluminum foil is etched by applying alternating current in an electrolytic solution containing chloride ions and the like, the alternating current contains, during the positive half period and the negative half period, two half waves having different waveforms, amplitudes, and applied times, and a rest period between the half waves with the amplitude being 0 or with microcurrent being applied on the positive side or the negative side at at most 1/15 of the maximum amplitude during a half period.Type: GrantFiled: December 9, 1994Date of Patent: March 19, 1996Assignee: Nihon Chikudenki Kogyo Kabushiki KaishaInventor: Yoshio Yoneyama