Patents Examined by Ralph S. Kendall
  • Patent number: 4351675
    Abstract: An aqueous acidic coating solution for treating zinc, zinc alloy or cadmium surface comprising (A) an oxidizing agent selected from the group consisting of hydrogen peroxide, nitrate ion, nitrite ion, halate ion or mixtures thereof, and (B) a compound having the formula ##STR1## wherein R is hydrogen or an alkyl group of from 1 to 4 carbon atoms.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: September 28, 1982
    Assignee: ROHCO, Inc.
    Inventor: Donald J. Guhde
  • Patent number: 4351266
    Abstract: An apparatus for dipping plating objects such as IC lead frame of a rectangular shape obtained by press forming and etching thin metal pieces, wherein a plural number of said rectangular sheets aligned and supported on the freely descending and returning rack base of the support carriage of the objects to be plated are concurrently subjected to dipping plating by determining the position of the said plural number of rectangular sheets to be plated for lowering into the plating tanks, and abutting the upper surface of the objects to be plated with the holding means thereby subjecting a plural number of objects to be plated.
    Type: Grant
    Filed: April 17, 1980
    Date of Patent: September 28, 1982
    Assignee: Electroplating Engineers of Japan, Limited
    Inventors: Masato Ando, Kenji Yamamoto, Kazuhiro Taniguchi
  • Patent number: 4350719
    Abstract: Ferrous metal or titanium or aluminum is coated with a mixture of phosphoric acid, chromic acid and magnesium salts of these acids, as well as with aluminum flakes, or coated with a mixture of aluminum flakes and magnesium chromate or dichromate, to provide after baking excellent resistance to attack. Aluminum-silicon alloys containing about 10 to about 15 weight percent silicon give better results than ordinary aluminum, particularly when the aluminum is in powder form; and when coated products are given a burnishing treatment. Very good masking for pack diffusion aluminizing or chromizing on any metal to keep portions from being diffusion coated is effected by localized coating, the lowest layer of which is depletion-reducing. The upper coating layer can be of non-contaminating particles like nickel or Cr.sub.2 O.sub.3 that upon aluminizing or chromizing become coherently held together to form a secure sheath. Such sheath can also be used for holding localized diffusion-coating layer in place.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: September 21, 1982
    Assignee: Alloy Surfaces Company, Inc.
    Inventor: Alfonso L. Baldi
  • Patent number: 4349391
    Abstract: This invention relates to an improved process for preserving a planographic printing form which is ready for printing. In the process, the planographic printing form is treated with an aqueous solution of a water-soluble, film-forming high-molecular weight organic compound and a hydrophilizing acid and is then dried. The hydrophilizing acid used is an organic phosphonic acid, in particular polyvinyl phosphonic acid, preferably in a concentration from 0.05 to 10 percent by weight. As the water-soluble, high-molecular weight organic compound gum arabic, dextrin or polyvinyl alcohol is appropriately used.
    Type: Grant
    Filed: February 18, 1981
    Date of Patent: September 14, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Loni Schell
  • Patent number: 4349392
    Abstract: An aqueous acidic solution and process for treating metal surfaces, particularly zinc and zinc alloy surfaces, for depositing a passivate film of improved clarity and hardness and to impart improved corrosion resistance thereto. The solution contains effective amounts of chromium ions substantially all of which are in the trivalent state, hydrogen ions to provide a pH of about 1.2 to about 2.5, an oxidizing agent, a bath soluble and compatible organic carboxylic acid or metal salts thereof present in an amount to impart increased initial hardness and improved clarity to the passivate film and at least one additional metal ion selected from the group consisting of iron, cobalt, nickel, molybdenum, manganese, lanthanum, cerium, lanthanide mixtures as well as mixtures thereof. The treating solution may optionally further contain halide ions and a wetting agent.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: September 14, 1982
    Assignee: Occidental Chemical Corporation
    Inventor: Robert J. Huvar
  • Patent number: 4348980
    Abstract: The invention relates to a process and apparatus for boronizing pieces made of metal or cermet and to surface-boronized pieces. The pieces are placed in a chamber at between and 1, C. and they are subjected, in the presence of boron carbide, to a gaseous stream of trifluoroboroxole (BOF).sub.3. The boron carbide is advantageously pulverulent and out of contact with the pieces to be boronized.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: September 14, 1982
    Assignee: Association pour la Recherche et le Development des Methodes et Processus Industriels (Armines)
    Inventors: Francois H. J. Thevenot, Patrice M. V. Goeuriot, Julian H. Driver, Jean-Paul R. Lebrun
  • Patent number: 4348241
    Abstract: A shaping ferrous metal member used in a metal-working apparatus is heat-treated at about 1, C. for several hours in an incompletely burning fuel gas, to provide a burned gas atmosphere composed of 0.5 to 5.0% of CO, 8 to 12% of CO.sub.2, 0 to 0.5% of O.sub.2. A tough iron oxide layer of high quality is tightly deposited with a uniform thickness by said heat-treatment on the surface of shaping metal member which is abrasively contacted by a sliding semifinished metal product. The advantageous effect of this method is that a consumable shaping metal member has a life 2 to 4 times longer than that of a metal member which is conventionally heat-treated in a completely-burning fuel gas.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: September 7, 1982
    Assignee: Shinhokoku Steel Corporation
    Inventors: Saburo Kunioka, Hatsuo Kawaguchi, Minoru Ono
  • Patent number: 4347806
    Abstract: An apparatus for applying a liquid product to a workpiece includes a pump piston and cylinder unit for pumping the product through a valved outlet orifice, displacement of the piston being adjustable for controlling the amount of product dispensed, the piston being pneumatically operated, and a rotatable turret being mounted on the unit and having a plurality of seats for holding workpieces of different sizes. Liquid product passageways extend from the seats toward the outlet orifice, and one of such passage ways communicates with the orifice in a selected rotative position of the turret.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: September 7, 1982
    Assignee: Loctite Corporation
    Inventors: Dennis J. Argazzi, Robert Burger
  • Patent number: 4347085
    Abstract: An aqueous coating solution for forming an insulative coating directly on electrical steels and on steels having a mill glass thereon. The aqueous solution comprises an aluminum-magnesium phosphate premix solution and a colloidal silica solution. The premix solution also comprises from about 10 to about 45 parts by weight Cr.sub.2 O.sub.3 for every 100 parts by weight H.sub.2 PO.sub.4.sup.- calculated as H.sub.3 PO.sub.4 on a water-free basis, from about 5 to about 20 parts of a compound chosen from the class consisting of boric acid, vanadium pentoxide and mixtures thereof per 100 parts H.sub.2 PO.sub.4.sup.- calculated as H.sub.3 PO.sub.4 on a water-free basis and additional Mg.sup.++ up to that amount which will go into solution. The colloidal silica solution is present in an amount of from that amount which will form a good glass up to 40 volume percent to provide a coating solution having a premix solution to colloidal silica solution volume ratio up to 1.5:1.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: August 31, 1982
    Assignee: Armco Inc.
    Inventors: Michael H. Haselkorn, Dannie S. Loudermilk
  • Patent number: 4345543
    Abstract: Method and apparatus for coating a moving web and for independently controlling the coating's width, thickness and uniformity of thickness along the length of the web. A back-up roller supports the moving web on a portion of the roller's periphery. A stationary and pliant smoothing film is positioned adjacent the exposed surface of the web which is supported by the back-up roller. A coating liquid is metered to the confluence of the web and the smoothing film, the metering rate being selected to produce a desired coating width. A pliant pressure generating means, in the form of a membrane or a force web, holds a length of the smoothing film against the moving web with a static force whose magnitude is selected in accordance with a desired coating thickness. The relative position of the back-up roller and the pressure generating means determines the length of coincidence of the moving web, the coating liquid, and stationary smoothing film.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: August 24, 1982
    Assignee: International Business Machines Corporation
    Inventor: David J. Pipkin
  • Patent number: 4346128
    Abstract: An improved tank process for plating aluminum substrates which is especially advantageous for plating porous aluminum castings and, blister-free plated aluminum substrates produced thereby, characterized in that the aluminum piece parts are: (i) emulsion cleaned in a room temperature alkaline cleaner; (ii) immersed in a room temperature dilute acid, inorganic, fluoride salt solution to dissolve heavy oxides and surface silicon while minimizing etching and intergranular attack of the aluminum substrate such, for example, as a porous cast aluminum substrate; (iii) immersed in a room temperature dilute zincate bath for applying a relatively thin zinc protective coating, preferably utilizing a double zincate immersion process with an intermediate prolonged (1-3 min.) nitric acid soak to reduce the zincate deposition rate and to thereby provide improved zincate adhesion; (iv) plated with a non-porous strike applied directly on the zincate protective coating--e.g.
    Type: Grant
    Filed: May 19, 1981
    Date of Patent: August 24, 1982
    Assignee: The Boeing Company
    Inventor: David M. Loch
  • Patent number: 4344991
    Abstract: Method and apparatus are disclosed for spraying water-borne emulsion topcoat finish materials with gloss and clarity equivalent to solvent-based topcoat materials irrespective of ambient conditions. One or more secondary water atomizing sprays are positioned laterally of the primary emulsion spray nozzle to lay down a mist layer underneath or on top or, preferably, both underneath and on top of the emulsion topcoat layer to retard premature coalescence of the emulsion particles thus permitting release of air bubbles entrained in the emulsion film during the spraying process. The water mist spray is preferably not intermingled with the emulsion spray in the space between the spray nozzles and finish surface but kept close enough to the emulsion spray to avoid significant coalescence of the emulsion film before the entrained air bubbles are released.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: August 17, 1982
    Assignee: Reliance Universal, Inc.
    Inventor: Richard L. Gray
  • Patent number: 4344380
    Abstract: An apparatus for applying photo resist on both surfaces of a semiconductor wafer is disclosed.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: August 17, 1982
    Assignee: M. Setek Company Limited
    Inventors: Ritsuo Matsumiya, Mitsuaki Osawa
  • Patent number: 4344381
    Abstract: Apparatus for electrostatically coating an elongated object of indefinite length which is aligned with the straight line path of the elongated object in a continuous manufacturing and finishing process. Electrostatic applicators are mounted to direct the coating into a substantially closed chamber at a portion of the elongated object passing therethrough. To substantially eliminate the explosive hazard occasioned by the use of an organic solvent-based coating material in the presence of electrical equipment, a combustibly inert atmosphere is maintained in the chamber and in an exhaust system leading therefrom. To maintain the electrostatic field, the coating chamber and associated coating equipment must be electrically isolated from ground.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: August 17, 1982
    Assignee: Allied Tube & Conduit Corporation
    Inventors: Arthur E. Ostrowski, Joseph M. Polich
  • Patent number: 4344980
    Abstract: A method for fabricating superior ohmic contacts in a III-V semiconductor wafer by virtue of double donor (or double acceptor) impurity complex formation. A typical III-V, e.g., GaAs, semiconductor device is fabricated by depositing a thin Si.sub.3 N.sub.4 layer and then regions are opened, by photoresist methods, upon which ohmic contacts are to be made. New resist is applied over the wafer and the ohmic contact regions are again opened. Si ions are now implanted to form the active channel and the drain and source regions (in an FET device). The resist layer is removed, a layer of Ge is laid down and a layer of Se over the Ge. The Ge layer is coated with a layer of SiO.sub.2, Si.sub.3 N.sub.4 or a mixture of both, and annealed, causing the Ge and Se to diffuse rapidly into the Si ion implant region. The SiO.sub.2, Si.sub.3 N.sub.4 and excess surface Ge and Se is now removed.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: August 17, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Max N. Yoder
  • Patent number: 4343660
    Abstract: This invention relates to the process of inhibiting corrosion, and to compositions employed therein, which comprises coating copper with a barrier corrosion inhibitor, such as a water insoluble sulfonate, for example a petroleum or similar sulfonate as illustrated by a metal petroleum sulfonate, which contains an agent capable of complexing with copper, such as an organic sulfur, nitrogen, or sulfur-nitrogen compound for example an organic triazole, thiazole or the like. This process is particularly effective in inhibiting the corrosion of copper buried in the earth such as occurs when copper is exposed to electrochemical forces such as when copper is employed as neutral wires wrapped around the outside of an insulated power conducting cable and buried in the earth.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: August 10, 1982
    Assignee: Petrolite Corporation
    Inventor: Richard L. Martin
  • Patent number: 4343659
    Abstract: A copper barrier type, nuclear fuel cladding is produced by forming an oxide layer on the inner wall surface of a tube of zirconium or zirconium alloy and then applying electroless copper plating to the oxide layer with a solution containing at least a copper salt, a complexing agent, a reducing agent, and 2,2'-dipyridyl, or further together with polyalkylene glycol as a plating solution. A good adhesiveness is obtained between the copper barrier layer and the oxide layer.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: August 10, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Kanji Murakami, Motoyo Wajima, Tetsuo Ishikawa
  • Patent number: 4342661
    Abstract: A heat storage medium contains (a) a sodium hydroxide in concentration from 60% by weight up to and including the stoichiometric concentration in sodium hydroxide monohydrate, (b) water in concentration from 40% by weight down to and including the said stoichiometric concentration, and (c) 0.1 to 2.0% by weight of tellurium dioxide, all percentages being expressed as percentages by weight of the total weight of sodium hydroxide and water. The tellurium dioxide reduces the tendency of the sodium hydroxide water system to supercool.
    Type: Grant
    Filed: June 3, 1981
    Date of Patent: August 3, 1982
    Assignee: The British Petroleum Company Limited
    Inventors: Jorn Ehlers, Helmut Haukelt
  • Patent number: 4341823
    Abstract: The present invention comprises a process of preparing metal matrix composites which are reinforced by ceramic or graphite fibers, wherein the fibers are pretreated; first by a nickel coating, then by a second coating which is sacrificed when the fibers are ultimately immersed in a liquid metallic bath which becomes the matrix of the composite material formed. Usually the second coating is copper.In addition, a third coating on the fibers comprising a noble metal such as silver may also be used for certain matrix metal materials. Preferably the thickness of the nickel coating is a minimum of 0.5 micrometers and the second sacrificial coating is a minimum of 0.5 micrometers. After the fibers have been coated with the two or more successive coatings, they are incorporated into a metal matrix composite material by immersion in a molten bath of the desired matrix metal, or by placing the fibers in a suitable mold and casting the molten metal matrix around them, or by other suitable means.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: July 27, 1982
    Assignee: Material Concepts, Inc.
    Inventors: Richard W. Sexton, David M. Goddard
  • Patent number: 4340620
    Abstract: A method for activating titanium surfaces for subsequent plating with metallic coatings comprising:(a) wet peening the titanium surface to be plated using fine-grain Al.sub.2 O.sub.3,(b) pickling the peened surface with a fluoridic solution at room temperature for several minutes, and(c) activating the surface with a solution containing chromium, fluorine, and arsenic or antimony at temperatures of to C. for fifteen to fifty minutes.The molar ratio of fluorine to arsenic or antimony is between six and seven, and the molar ratio of chromium to antimony or arsenic is between three and six.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: July 20, 1982
    Assignee: MTU Motoren-und Turbinen-Union
    Inventors: Gotz Mielsch, Rolf Dunker, Martin Thoma