Patents Examined by John H. Mack
  • Ventilated diaphragm support for chlor-alkali cell
    Patent number: 4196071
    Abstract: A perforated support for helping prevent damage to a non-adherent membrane in a chlorine gas-producing cell configuration having downwardly open, gas-trapping pockets adjacent such a membrane in the upper end of a chlorine-producing anolyte chamber. The cathode chamber can be at a greater pressure than the anode chamber to force the diaphragm against the support.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: April 1, 1980
    Assignee: Olin Corporation
    Inventors: Judson A. Wood, Steven J. Specht
  • Means for distributing electrolyte into electrolytic cells
    Patent number: 4196069
    Abstract: The present invention provides an electrolyte feed system for feeding an individual supply of electrolyte to electrolytic cells in a filter press cell circuit. The system includes a primary electrolyte feed line, having one closed end and a plurality of outlets, or orifices, therein spaced along the length of the line. The primary feed line is encased in a larger, secondary feed line. The secondary feed line has a plurality of outlets, or orifices, therein spaced along its length corresponding to the outlets in the primary feed line. In a preferred embodiment, the feed lines are circular in cross-section and are in the form of pipes or tubes. The outlets in the primary and secondary feed lines are spacedly aligned, and the outlets in the secondary feed line are communicatively connected with the electrolyte inlets in the cell compartments of the individual cells in the cell circuit.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: April 1, 1980
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventors: Luciano Mose, Helmut Schurig, Bernd Strasser
  • Electrolytic reduction cells
    Patent number: 4194959
    Abstract: An electrolytic reduction cell for the production of aluminium has current collector bars running across the floor of the cell unitarily or in separate sections. Deformation of the molten metal/electrolytic bath interface is reduced by leading current out of the collector bars or bar sections at positions remote from their ends by connector bars connected to said positions.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: March 25, 1980
    Assignee: Alcan Research and Development Limited
    Inventors: Thomas J. Hudson, Jean-Paul R. Huni, Vinko Potocnik, Donald W. MacMillan
  • Electrolytic etch preparation of semiconductor surfaces
    Patent number: 4194954
    Abstract: The surface of a semiconductor is prepared by electrolytically removing the surface of the semiconductor. A two component electrolyte is used. A first component forms an oxide on the surface of the semiconductor and the second component dissolves the oxide.
    Type: Grant
    Filed: March 8, 1978
    Date of Patent: March 25, 1980
    Assignee: The Post Office
    Inventors: Marc M. Faktor, John L. Stevenson
  • Arrangement for compensating for detrimental magnetic influence between two or more rows of transverse electrolytic pots or cells for producing aluminum, by electrolytic reduction
    Patent number: 4194958
    Abstract: An arrangement is provided for compensation for detrimental magnetic influence between two or more rows of transverse electrolytic pots or cells for producing aluminum, by electrolytic reduction in a molten bath, in which most of the current conducted from the rear side of a pot in the pot row to the succeeding pot in the row, is carried by two or more conductors underneath the pot. Another and smaller proportion of the current conducted to the succeeding pot in the row is conducted in its entirety around that short side of the pot which faces the magnetically dominating adjacent pot row. Preferably, this smaller proportion of the current amounts to a maximum of twenty percent of the total electrolysis current.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: March 25, 1980
    Assignee: Ardal og Sunndal Verk a. s.
    Inventor: Hans G. T. Nebell
  • Method and apparatus for electrical machining with a multi-guided travelling electrode
    Patent number: 4193852
    Abstract: A traveling wire electrical machining system makes use of a single-strand traveling wire which is guided in a plurality of passes across a workpiece to cut through the latter at a plurality of parallel locations. According to the invention, the machining power supply has a plurality of outputs each of which is connected to a respective stretch of the traveling wire, thereby equalizing the machining current for each of the multiple stretches.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: March 18, 1980
    Assignee: Inoue-Japax Research Incorporated
    Inventor: Kiyoshi Inoue
  • Stack pack electrolytic cell
    Patent number: 4193858
    Abstract: Disclosed is a stack pack type electrolytic cell for the generation of chlorates or hypochlorites of sodium or potassium having the ability to make economical use of materials while eliminating the necessity for large external studs for the electrode components, housings to retain fluids and intercell piping connections since the cell can be increased in capacity by adding chambers and electrode stack packs to the cell makeup or adding electrodes to the stack packs. Such an electrolyzer can utilize mass produced components to produce various capacities and can be assembled either monopolar or bipolar in configuration to make most efficient use of existing electrical supply equipment.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: March 18, 1980
    Assignee: Diamond Shamrock Corporation
    Inventor: J. Edward Loeffler, Jr.
  • Process for the production of composite material
    Patent number: 4193848
    Abstract: A composite material for graphical applications, in particular for nameplate production and having foil of aluminium or one of its alloys stuck on to a support foil. This aluminium foil bears on its side facing away from the supporting layer an aluminum oxide layer, which is thick by comparison with the thickness of the aluminium foil, on top of which there is a further layer of a light sensitive plastic.
    Type: Grant
    Filed: July 20, 1978
    Date of Patent: March 18, 1980
    Assignee: Swiss Aluminium Ltd.
    Inventor: Harald Severus-Laubenteid
  • Selective multiple electrode waste water treating system
    Patent number: 4193859
    Abstract: A plurality of individual treaters, each containing a pair of oppositely charged electrodes, are arranged circularly around a centrally disposed tank into which all of the treaters empty. A common supply manifold for all of the treaters brings waste water or other liquids into the system for treatment by any selected one of the treaters upon opening a control valve associated with such selected treater and closing control valves associated with the remaining treaters. Each treater contains an electrode that is constructed from a material differing from that of electrodes in the remaining treaters so that a particular treater may be selected for use based upon the predicted reaction of the material from which its electrode is made with the particular constituents of the waste liquid being treated.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: March 18, 1980
    Inventor: Arthur S. King
  • Apparatus for forming an aluminum interconnect structure on an integrated circuit chip
    Patent number: 4192729
    Abstract: An apparatus for forming an interconnect structure on an integrated circuit chip by employing a single chamber for both the required etching and anodization. It has been discovered that an etchant-electrolyte such as phosphoric acid solution in the ratios of one part phosphoric acid to four parts of water can serve as both an etchant and an electrolyte without causing deterioration of the photoresist pattern representing the interconnect structure.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: March 11, 1980
    Assignee: Burroughs Corporation
    Inventors: Dan Cancelleri, Charles E. Thompson
  • Apparatus for finishing and upgrading of heavy water
    Patent number: 4191626
    Abstract: Apparatus for upgrading and final enrichment of heavy water comprising means for contacting partially enriched heavy water feed in a catalyst column with hydrogen gas (essentially D.sub.2) originating in an electrolysis cell so as to enrich the feed water with deuterium extracted from the electrolytic hydrogen gas and means for passing the deuterium enriched water to the electrolysis cell.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: March 4, 1980
    Assignee: Atomic Energy of Canada Limited
    Inventors: Martin Hammerli, John P. Butler
  • Reinforced casing for an electrode for a diaphragm-type electrolytic cell and a method of fabrication
    Patent number: 4191627
    Abstract: A casing suitable for covering a substantially rectangular electrode for a diaphragm-type electrolytic cell comprises a closed end, an open end, and two closed, reinforced sides.The casing is formed of a single flexible material which is folded or sealed to provide a plurality of fingers each having a closed end and then sealed to form two closed sides, such casing preferably having reinforced edges.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: March 4, 1980
    Assignee: Olin Corporation
    Inventor: Steven J. Specht
  • Method of manufacturing an internal mirror type gas laser tube
    Patent number: 4190511
    Abstract: A metallic member is disposed in the vicinity of a mirror within an internal mirror type gas laser tube, and an electric discharge is excited between an internal laser anode and the metallic member. The metallic member serves as a cathode to sputter the metal of the metallic member onto the surface of the internal mirror. The metal adheres to the surface of the mirror and forms a metallic film thereon. The output power of the lower tube is monitored during the sputtering process and the sputtering process is terminated when the output power is reduced to a desired output power value.
    Type: Grant
    Filed: September 19, 1978
    Date of Patent: February 26, 1980
    Assignee: Nippon Electric Co., Ltd.
    Inventor: Keiichi Shintaku
  • Apparatus for removal and recovery of tritium from light and heavy water
    Patent number: 4190515
    Abstract: A method and apparatus for removing tritium from heavy water and light water comprising contacting tritiated feed water in a catalyst column in countercurrent flow with hydrogen gas originating from an electrolysis cell so as to enrich this feed water with tritium from the electrolytic hydrogen gas and passing the tritium enriched water to an electrolysis cell wherein the electrolytic hydrogen gas is generated and then fed upwards through the catalyst column. The tritium content of the hydrogen gas leaving the top of the enricher catalyst column is further reduced in a stripper column containing catalyst which transfers the tritium to a countercurrent flow of liquid water.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: February 26, 1980
    Assignee: Atomic Energy of Canada Limited
    Inventors: John P. Butler, Martin Hammerli
  • System of busbars for aluminium-producing electrolyzers
    Patent number: 4189368
    Abstract: A system of busbars for aluminium-producing electrolyzers located at the ends of groups of series-connected electrolyzers arranged lengthwise in at least two parallel rows, incorporates stacks of cathode buses located to the left and to the right of a longitudinal axis of each row of electrolyzers in the direction of the current flow through the electrolyzers. The system incorporates a busbar jumper connecting the busbars of the first electrolyzer located at the end of one of the two rows of electrolyzers wih the busbars of the second electrolyzer located at the end of the other of the two rows of electrolyzers.
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: February 19, 1980
    Assignee: Vsesojuzny Nauchno-Issledovatelsky I Proektny Institut Aljuminievoi, Magnievoi I Elektrodnoi Promyshlennosti
    Inventors: Zinovy I. Gnesin, Svetozar V. Evdokimov, Ilya G. Kil, Vladimir P. Nikiforov, Valentin I. Ryabov, Alexandr N. Smorodinov, Igor K. Tsybukov
  • Bipolar electrode for an electrolyser
    Patent number: 4187165
    Abstract: A bipolar electrode for an electolyser. It is characterized in that the anode surface and the cathode surface of said electrode both comprise a porous conductive material which includes sintered nickel previously impregnated with nickel molybdate. The invention is used for manufacturing hydrogen by electrolysing an aqueous alkaline solution.
    Type: Grant
    Filed: February 1, 1979
    Date of Patent: February 5, 1980
    Assignee: Compagnie Generale d'Electricite
    Inventors: Anthony J. Appleby, Gilles Crepy
  • Cathode for use in the electrolytic refining of copper
    Patent number: 4186074
    Abstract: A cathode for use in the electrolytic refining of copper, comprises a stainless steel hanger bar having a flat undersurface with end portions to rest on supports and electrical contacts, and a flat stainless steel starter sheet welded to the undersurface between said end portions and by one edge so to project perpendicularly from that surface. At least the upright side edges of the sheet are masked to prevent copper deposit thereon, and to improve conductivity from bus-bar to hanger bar and to starter sheet, the hanger bar and that edge margin of the starter sheet welded to it are clad with copper.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: January 29, 1980
    Assignee: Copper Refineries Pty. Limited
    Inventor: Ian J. Perry
  • Boiling heat transfer surface, method of preparing same and method of boiling
    Patent number: 4186063
    Abstract: Improved nucleate boiling cavities are provided in a heat exchange surface by mechanically forming indentations on the heat transfer surface and then electrodepositing a metal on the pitted surface at a high current density followed by strengthening at lower current densities. Also described is a method of transferring heat from a warm fluid to a boiling liquid utilizing the improved nucleate boiling structure.
    Type: Grant
    Filed: November 1, 1977
    Date of Patent: January 29, 1980
    Assignee: Borg-Warner Corporation
    Inventors: Clarence E. Albertson, George M. Nichols, John N. Rasmussen
  • Process of electro-eroding channels in multiple buccal tube device
    Patent number: 4184254
    Abstract: A buccal tube device has a body attached to a tooth band. The body contains at least one channel with a non-circular cross-section. The channel is formed in the body by an electroerosion process. In a preferred form, the channel cross-section is four cornered and is inclined. The invention also includes a process for forming such buccal tubes by providing an electroerosion electrode with a non-circular cross-section and using it to form a channel of corresponding cross-section. The electroerosion process may include flushing the channel thus formed during the electroerosion.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: January 22, 1980
    Assignee: Dentaurum Hans-Peter Winkelstroeter KG
    Inventor: Hans J. Kraus
  • Process and apparatus for effecting surface treatment of workpieces
    Patent number: 4184927
    Abstract: Workpieces vertically suspended on carrier bars in side-by-side relation are dipped into an electrolyte bath which has a plurality of electric contact plates of alternating polarity spaced along one side. Electric energy is applied to the workpieces from the plates through the carrier bars and the successive work pieces serve as electrodes of opposite polarity, the polarities reversing as the individual carrier bars are advanced from plate to plate.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: January 22, 1980
    Assignee: Riken Keikinzoku Kogyo Kabushiki Kaisha
    Inventors: Toshiro Takahashi, Masashi Ikegaya