Patents Represented by Attorney Cornelius F. O'Brien
  • Patent number: 6503290
    Abstract: The invention is a corrosion resistant powder useful for deposition through thermal spray devices. The powder consists essentially of, by weight percent, 30 to 60 tungsten, 27 to 60 chromium, 1.5 to 6 carbon, a total of 10 to 40 cobalt plus nickel and incidental impurities plus melting point suppressants.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: January 7, 2003
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: William John Crim Jarosinski, Lewis Benton Temples
  • Patent number: 6007922
    Abstract: A new family of chromium boride coatings having excellent adhesive wear and corrosion resistance is disclosed. The coatings comprise hard, ultrafine, chromium boride particles dispersed in a metal matrix, the particles having an average particle size of less than one micron and constituting less than about 30 volume percent of the coating, the balance being metal matrix. The metal matrix may be composed of nickel or a nickel base alloy containing a metal selected from the group consisting of chromium, silicon and iron. The coatings may be prepared by a process which comprises depositing a mechanically blended powder mixture of chromium metal or a chromium alloy or mixture of both, and a boron-containing alloy onto a substrate and then heat treating the as-deposited coating. The heat treatment effects a diffusion reaction between the deposited elements resulting in the formation of ultrafine particles of chromium boride dispersed in a metal matrix.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: December 28, 1999
    Assignee: Union Carbide Coatings Service Corporation
    Inventors: Jiinjen Albert Sue, Robert Clark Tucker, Jr., Joseph Patrick Nemeth
  • Patent number: 5981081
    Abstract: A new family of transition metal boride coatings having excellent wear and corrosion resistance is disclosed. The coatings comprise hard, ultrafine, transition metal boride particles dispersed in a metal matrix, the particles constituting from about 30 to about 90 volume percent of the coating, the balance being metal matrix. The average size of the particles ranges from about 0.5 to about 3.0 microns. The metal matrix contains at least one metal selected from the group consisting of nickel, cobalt and iron. The coatings may be prepared by a process which comprises depositing a mechanically blended powder mixture of a transition metal and a boron-containing alloy onto a substrate and then heat treating the as-deposited coating. The heat treatment effects a diffusion reaction between the deposited elements resulting in the formation of ultrafine particles of a transition metal boride dispersed in the metal matrix. The coating can be deposited onto the substrate using any of the known deposition techniques.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: November 9, 1999
    Assignee: Union Carbide Coatings Service Corporation
    Inventor: Jiinjen Albert Sue
  • Patent number: 5966585
    Abstract: A new family of titanium carbide/tungsten boride coatings having excellent wear and corrosion resistance is disclosed. The coatings comprise hard, ultrafine, titanium carbide particles and tungsten boride precipitates dispersed in a metal matrix, the two phases constituting from about 30 to about 80 volume percent of the coating, the balance being metal matrix. The metal matrix contains at least one metal selected from a group consisting of nickel, cobalt and iron. The coatings may be prepared by a process which comprises depositing a mechanically blended powder mixture composed of separate components including a first component containing tungsten carbide and a second component containing boron and at least one metal selected from the group consisting of nickel, cobalt and iron, the powder mixture including titanium in the first or second component or in a separate third component, at least one of the first, second or third components having a melting point below about 1200.degree. C.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: October 12, 1999
    Assignee: Union Carbide Coatings Service Corporation
    Inventor: Jiinjen Albert Sue
  • Patent number: 5652028
    Abstract: A thermal spray process for producing a MCrAlY-based coating wherein M is selected from the group consisting of iron, cobalt, nickel and mixtures thereof and wherein the carbon in the fuel of the thermal spray process converts between 30 to 80 percent by weight of the chromium component in the coating to chromium carbide.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: July 29, 1997
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Thomas Alan Taylor, James Kent Knapp
  • Patent number: 5648168
    Abstract: A corona electrode, such as a roller electrode, having an outer dielectric layer and an undercoat of a copper layer that permits the electrode to operate at a lower temperature for a specific power input over a similar electrode without the copper undercoat.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: July 15, 1997
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Russell Bruce Hatch, Keith Edward Bowen
  • Patent number: 5557549
    Abstract: This invention is a method and system for troubleshooting a breakdown or malfunction in an industrial plant facility identified by alarm or shutdown signals based upon forming a knowledge base of knowledge elements for providing advice and guidance to the technician. Each fault condition has a set of knowledge elements arranged in a sequence having an ordered hierarchy corresponding to different levels of information. The subordinate knowledge elements are linked to permit selection for display on a computer monitor in a specified manner and in a predetermined cascade arrangement relative to each higher level knowledge element to which it is linked.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: September 17, 1996
    Assignee: Praxair Technology, Inc.
    Inventor: Ching M. Chang
  • Patent number: 5553635
    Abstract: A fluid delivery force-actuated valve, such as a gas delivery pneumatic-actuated valve suitable for use in the electronic industry, employing bellows means so that the actuation means can be used to open or close the valve independent of the force of the pressurized fluid. A method for delivering the pressurized fluid, such as gas, is also disclosed.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: September 10, 1996
    Assignee: Praxair Technology, Inc.
    Inventor: Roger J. Gregoire
  • Patent number: 5554273
    Abstract: A method for correcting an output from an electrochemical cell sensor, having an output responsive to a concentration of sensed species in a stream, a pressure and a temperature in an interactive non-linear relationship, comprising the steps of providing a pressure sensor for producing an output responsive to a pressure in proximity to the electrochemical sensor; providing a temperature sensor for producing an output responsive to a temperature of said electrochemical sensor; and processing the outputs of the electrochemical sensor, pressure sensor and temperature sensor in a neural network having an output function which compensates said electrochemical sensor for changes in pressure and temperature to indicate a concentration of the sensed species.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: September 10, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Hollis C. Demmin, Richard B. Mazzarella, James D. Borkman
  • Patent number: 5522224
    Abstract: A cryogenic air separation process generates both an intermediate product and an output product. The intermediate product is produced earlier in time than the output product and variations in output product measurements correlate to earlier variations in intermediate product measurements. The process responds to plural independent variable phenomena. The apparatus includes analyzers for providing measures of the intermediate and output products and the independent variable phenomena. A control processor predicts a measure of the intermediate product, based on the independent variable phenomena and output predicted values therefor. A difference is then determined between the current predicted value for the intermediate product and a measure of the intermediate product, to arrive at a prediction error.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: June 4, 1996
    Assignee: Praxair Technology, Inc.
    Inventor: William M. Canney
  • Patent number: 5520516
    Abstract: A compressor or turbine blade having its tip coated with a zirconium-based oxide having a plurality of macrocracks extending at least 100 microns through the coating and the process used to produce such a coating.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: May 28, 1996
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Thomas A. Taylor, Don J. Lemen
  • Patent number: 5466907
    Abstract: A process of coating the internal surface of a hollow body by depositing a coating on a substrate having an external surface similar to the internal surface of the hollow body; inserting the coated substrate to mate within and contact the internal surface of the hollow body; and then removing the substrate while leaving the coating secured to the internal surface of the hollow body.
    Type: Grant
    Filed: September 16, 1993
    Date of Patent: November 14, 1995
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Jacques M. Vuitton
  • Patent number: 5466208
    Abstract: A process of providing a thermal spray powder feed coating composition composed of stabilized zirconia mixed with zircon and a selected oxide, such as yttria, to form a refractory oxide coating ideally suited for hearth rolls for annealing steel.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: November 14, 1995
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: John E. Jackson, Hideo Nitta, Katoh Shoichi, Masahiko Amano, Yasushi Kurisu, Keiichiro Ohno
  • Patent number: 5462429
    Abstract: A mechanical wiper mounted within an incinerator for waste gases, such as silane, and said wiper adapted to move adjacent selected internal surface areas to remove combustion products buildup on such selected areas.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: October 31, 1995
    Assignee: Praxair Technology, Inc.
    Inventors: Francis E. Pritchard, Eugene H. Koederitz, Ronald E. Fuhrhop, Thomas H. Barker, Jr.
  • Patent number: 5456950
    Abstract: An alloy of 3 to 9 weight percent boron with the balance molybdenum for use as a thermal spray coating for articles intended to be exposed to molten zinc.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: October 10, 1995
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: John C. Wood, Shoichi Katoh, Hideo Nitta
  • Patent number: 5455119
    Abstract: A coating composition comprising an alloy having the formula RCrAlR'R" wherein R is nickel, cobalt or the like; R' is yttrium or hafnium and R" is tantalum, rhenium and/or platinum, preferably mixed with an oxide dispersion such as alumina, to provide an improved class of coatings suitable for operating in high temperature oxidizing environments.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: October 3, 1995
    Assignees: Praxair S.T. Technology, Inc., Rolls-Royce PLC
    Inventors: Thomas A. Taylor, David F. Bettridge, Robert C. Tucker, Jr.
  • Patent number: 5451470
    Abstract: An impervious corrosion resistance nickel-chromium coating on a metallic substrate, such as an iron-containing alloy substrate that protects the substrate from a corrosive media and the process for producing the coating on the substrate.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: September 19, 1995
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Adil A. Ashary, Robert C. Tucker, Jr.
  • Patent number: 5448893
    Abstract: The present invention is a process for maximizing the recovery of argon at high argon recovery rates from an air separation system having a high and low pressure distillation column containing multiple distillation stages of rectification and having a sidearm column for argon recovery. A compositional measurement is made of a process variable at one or more preselected stages of rectification which have been identified as exhibiting high sensitivity to plant process variations. The total nitrogen content in a selected area of the argon sidearm column may then be compensated by simulated mathematical correlation from such compositional measurement.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: September 12, 1995
    Assignee: Praxair Technology, Inc.
    Inventors: Henry E. Howard, Dante P. Bonaquist, William M. Canney, William A. Nash
  • Patent number: 5443658
    Abstract: A braze filler metal alloy paste containing braze metal alloy powders, such as a nickel- or cobalt-based braze filler metal, homogeneously dispersed throughout an aqueous gel solution comprising a binder such as a cellulose material, for example, sodium carboxymethyl-cellulose and a dispersants such as mineral oil and glycerine.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: August 22, 1995
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Frank J. Hermanek
  • Patent number: 5438864
    Abstract: A method of using a fluorescent fluid on a cell-engraved surface, such as an anilox roll, to determine the volumetric capacity of the cell-engraved surface by having the amount of electromagnetic radiation emitted by the exciting of the fluorescent fluid substantially proportional to the volume of the fluorescent fluid in the cells.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: August 8, 1995
    Assignee: Praxair S.T. Technology, Inc.
    Inventor: Russell M. Morgan