Patents Examined by Ralph S. Kendall
  • Method for preventing cracks below seams during plating and welding
    Patent number: 4188419
    Abstract: A method for preventing the development of cracks below seams during the plating and welding of material by employing a heat source for producing local heating of the regions of the material adjacent the welding zone.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: February 12, 1980
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Klaus Detert, Wolfgang Bertram, Hermann Fischdick
  • Surface processing solution and surface treatment of aluminum or aluminum alloy substrate
    Patent number: 4187127
    Abstract: A surface processing solution for an aluminum or aluminum alloy substrate comprises 0.1 to 10 g/liter of one or more compounds selected from the group consisting of inositol di-.about.hexaphosphates and water soluble salts thereof and 0.1 to 10 g/liter as Ti of a titanium fluoride.A surface of an aluminum or aluminum alloy substrate is treated with said surface processing solution.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: February 5, 1980
    Assignee: Nihon Parkerizing Co., Ltd.
    Inventors: Kuniji Yashiro, Yukihiko Ayano, Yasushi Miyazaki
  • Process for treating coke oven doors and jambs to prevent the build up of tar thereon
    Patent number: 4187335
    Abstract: A process of treating a coke oven door and jamb with a material containing micron colloidal particles of graphite in a liquid carrier is described that forms a penetrating and surface coating on the coke oven doors and jambs which acts to prevent leakage of tar and other coke by-products as heretofore common in the art and the resultant inability of maintaining a sealing relation between the door and jamb.
    Type: Grant
    Filed: October 5, 1978
    Date of Patent: February 5, 1980
    Inventor: Michael D. La Bate
  • Chromium containing coating
    Patent number: 4186035
    Abstract: A chromium-containing treating composition, which is especially useful for rinsing phosphatized metal surfaces, contains hexavalent chromium-containing compound, methylene chloride and a substance that can be acetamide, N,N-dimethylformamide, acetone oxime and mixtures thereof. The composition is a homogeneous solution that is particularly useful where aqueous systems may create potential water pollution problems.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: January 29, 1980
    Assignee: Diamond Shamrock Corporation
    Inventors: William H. Cawley, Edward A. Rowe, Jr.
  • Weldable coating compositions
    Patent number: 4186036
    Abstract: An improvement in a weldable coating for metallic substrates containing a high molecular weight epoxy or phenoxy resin, an electroconductive pigment such as zinc and a diluent such as a glycol ether wherein the improvement resides in replacing at least about 70 weight percent of said resin with a composition containing a low molecular weight epoxy resin such as the diglycidyl ether of bisphenol A, a phenolic hydroxyl-containing compound such as a phenolic hydroxyl terminated adduct of a diglycidyl ether of a diphenolic compound such as bisphenol A and a catalyst for effecting the reaction between the epoxy resin and the adduct.
    Type: Grant
    Filed: August 25, 1978
    Date of Patent: January 29, 1980
    Assignee: The Dow Chemical Company
    Inventors: William J. Elms, Steven A. Weitzel
  • Catalytic electrode
    Patent number: 4184941
    Abstract: Disclosed is a method of preparing an electrodic surface on a metal substrate by depositing nickel and iron onto the substrate to form a nickel-iron surface and then leaching iron out of the surface to form a porous nickel surface. Also disclosed is an electrode prepared by depositing nickel and iron onto a metal substrate to form a nickel-iron surface, thereafter leaching the iron out of the surface to form a porous nickel surface.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: January 22, 1980
    Assignee: PPG Industries, Inc.
    Inventor: William W. Carlin
  • Method for reducing metal oxide formation on a continuous metal sheet in the hot dip coating thereof
    Patent number: 4183983
    Abstract: Sealing means for preventing metal vapor, and in particular zinc vapor, evolution from the surface of a bath into a furnace is provided at the exit end of the heat processing industrial furnace through which a continuous metal sheet is advanced. Upon exiting the furnace the metal sheet is dipped into a bath for hot dip coating thereof. At the zone of the industrial furnace from which the continuous metal sheet exits the furnace and advances into the coating bath, there is provided therein an atmosphere having a low dew point and a relatively high hydrogen content to thereby reduce the oxidation of the metal vapor which may have migrated into the furnace. Furthermore, sealing means are provided between zones of the furnace to retain the integrity of this atmosphere, and thus isolating zones having different atmosphere compositions.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: January 15, 1980
    Assignee: Selas Corporation of America
    Inventors: Eugene A. Cook, Chad F. Gottschlich
  • Coating process with voltammetric sensing of the coating solution
    Patent number: 4182638
    Abstract: The effective concentration of an electroactive ingredient of a coating solution is determined, and may be restored to a desired level, in response to deviations in the voltammetric current sensed at an indicating electrode comprised of a noble metal.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: January 8, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: Brian A. Cooke
  • Post phosphating inhibiting rinse
    Patent number: 4182637
    Abstract: Phosphated ferrous metal surfaces are treated with a rinse containing citric acid and sodium nitrite to enhance corrosion protection. This rinse has the advantages of providing an effluent which is not objectionable from an environmental viewpoint and does not stain the treated surfaces.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: January 8, 1980
    Assignee: BASF Wyandotte Corporation
    Inventors: Joseph V. Otrhalek, Raymond M. Ajluni, Gilbert S. Gomes
  • Wafer support
    Patent number: 4182265
    Abstract: A wafer support, comprising, a baseplate with an aperture therein and a hing ring rotatably positioned in the aperture. A platform is defined in the holding ring for supporting the peripheral edges of a wafer disposed therein and the holding ring includes a plurality of spaced slots extending parallel to the platform and spaced therefrom. A plurality of retaining rods are connected to the baseplate and extend into the slots to engage over the wafer positioned on the platform. A portion of the holding ring adjacent each slot defines a retaining rod abutment for urging each retaining rod out of its respective slot when the holding rod is rotated in the baseplate to release the supported wafer.
    Type: Grant
    Filed: March 14, 1978
    Date of Patent: January 8, 1980
    Assignee: Balzers Aktiengesellschaft fur Hochvakuumtechnik und Dunne Schichten
    Inventor: Bernhard Bracher
  • Method for improving the adhesion of brass-coated steel cord to rubber
    Patent number: 4182639
    Abstract: Brass-coated steel cord is provided with improved adhesive characteristics for use in tire making, by coating it with certain combinations of sulfur-containing accelerators and phosphate corrosion inhibitors.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: January 8, 1980
    Assignee: United States Steel Corporation
    Inventors: Arthur J. Pignocco, Michael E. Waitlevertch
  • Process of phosphating an iron substrate in a closed system using aromatic nitro compound accelerators
    Patent number: 4181539
    Abstract: A process for iron phosphating the surface of an iron substrate which comprises treating said surface with a phosphating solution comprising at least one of alkali metal and ammonium phosphates and at least one of aromatic nitro compounds as a phosphating accelerator in an aqueous medium and having a pH of about 3 to 6.5 in a closed system phosphating installation.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: January 1, 1980
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Ryoichi Murakami, Yukio Anegawa, Minoru Ishida, Keizi Masada
  • Metal surface treatment method
    Patent number: 4181540
    Abstract: A method of polishing or smoothing a metal surface includes the steps of (a) applying a solution of a compound capable of forming a friable, relatively impervious conversion coating on the surface, and (b) rubbing the conversion coating with a conforming surface while retaining the solution between the surfaces both to remove the conversion coating by abrasion and to expose the metal surface to the solution for further reaction, thereby repeatedly forming a conversion coating and breaking the coating away until the surface is smooth and polished.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: January 1, 1980
    Assignee: Whirlpool Corporation
    Inventor: Robert E. Ahlf
  • Phosphating of metallic substrate
    Patent number: 4180417
    Abstract: In a method for phosphating the surface of a metallic substrate by treatment with a phosphating solution containing nitrite ions as the accelerator, an improvement wherein the supply of the nitrite ions to the phosphating solution is carried out by electrolytic reduction of nitrate ions present in the phosphating solution while changing the direction of the current flow at a fixed interval of time, whereby a desired concentration of nitrite ions in the phosphating solution is maintained without accumulation of alkali metal and/or ammonium ions unavailable for the phosphating and also without accumulation of precipitates on the electrode, and a uniform phosphate coating film having satisfactorily good coating properties is formed on said surface.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: December 25, 1979
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Shoji Oka, Ryoichi Murakami, Akiko Sueyoshi
  • Process using activated electroless plating catalysts
    Patent number: 4180600
    Abstract: A process and method for the formation of novel colloidal catalytic electroless plating compositions comprising the admixture of at least one primary colloid stabilizer which otherwise renders the colloidal dispersion highly stable however weakly active with at least one secondary colloid stabilizer (or reactivity modifier) thereby activating the colloidal dispersion to a more active state when used in the catalytic treatment prior to electroless (chemical) plating.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: December 25, 1979
    Assignee: Nathan Feldstein
    Inventor: Nathan Feldstein
  • Method of improving corrosion resistance with coating by friction
    Patent number: 4178193
    Abstract: The corrosion resistance of a base metal article is improved by frictionally applying a metal to the article which is capable of forming an intermetallic compound with the base
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: December 11, 1979
    Inventor: Jerome J. Kanter
  • Apparatus for obtaining bright finish galvanizing coating on wire
    Patent number: 4177754
    Abstract: A method and apparatus utilized in conjunction with a wire galvanizing apparatus assures a bright finish on the coated wire. This method and apparatus includes passing the wire through a water quenching bath immediately following the emergence of wire from the molten zinc galvanizing bath of a conventional galvanizing apparatus. A pair of pressure pads grips the wire at its entrance to the water quenching bath for substantially sealing the water quenching bath against water leakage into the adjacent molten zinc galvanizing bath. A heating apparatus is directed at the wire prior to its entrance to the pressure pads to assure that the zinc coating is still in a molten condition as the wire enters the water quenching bath.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: December 11, 1979
    Assignee: Fennell Corporation
    Inventors: William L. James, Alex P. Wonso
  • Method and apparatus for treating one side of a strip
    Patent number: 4178397
    Abstract: A method and apparatus for treating only one side of a strip of material utilizes a pressurized foil bearing. The strip passes around the foil bearing while contacting a bath of liquid material. By controlling the pressure of the pressurizing medium used within the foil bearing, the strip is supported on a film of the pressurizing medium and the liquid material is prevented from contacting the side of the strip adjacent the foil bearing while the other side of the strip is in contact with the liquid material. Preferably, the pressurizing medium is at about the same temperature as the liquid material. Furthermore, a non-oxidizing gas may be used as the pressurizing medium to protect the side of the strip adjacent the foil bearing from oxidizing.
    Type: Grant
    Filed: July 12, 1978
    Date of Patent: December 11, 1979
    Assignee: Bethlehem Steel Corporation
    Inventor: John B. Lovis
  • Process for coating stainless steel with a lead-based alloy and article
    Patent number: 4177326
    Abstract: The invention relates to a process and installation for making stainless els coated with a lead-based alloy and having undergone annealing. The surface of the product is first prepared by mechanical treatment, then the product is pre-coated by known techniques such as hot tin-plating, after which the annealing treatment is effected, followed by the final coating. Such products may be used, inter alia, in the manufacture of car radiators.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: December 4, 1979
    Assignee: VALLOUREC Usines a Tubes de Lorraine-Escaut et Vallourec Reunies
    Inventors: Bernard A. M. Windal, Edmond Lobry
  • Melamine-formaldehyde and tannin treatment of metal surfaces
    Patent number: 4174980
    Abstract: Disclosed is a single-application non-electrolytic method for the treatment of bare metal surfaces to form a corrosion-resistant coating. The clean metal surfaces are treated with an aqueous composition containing a melamine-formaldehyde resin and a vegetable tannin. The resulting dried coating exhibits superior qualities for a single-application coating process when used as a paint base and the process does not require the use of environmentally objectionable chromium compounds. Application to ferrous, zinc or aluminum surfaces may be by any known technique designed to provide a deposited layer of desired uniformity.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: November 20, 1979
    Assignee: Oxy Metal Industries Corporation
    Inventors: John K. Howell, Jr., Leonard Kulick