Patents Represented by Attorney John E. Whitman Breed Abbott & Morgan LLP Boyd, Esq.
  • Patent number: 6103402
    Abstract: A containerless method of producing a crack free metallic article of near-net shape includes melting a filler material into a metallic substrate or seed under conditions chosen to preclude cracking. In a preferred embodiment of the invention, a laser beam is operated at a relatively low power density and at a relatively large beam diameter at the substrate surface for an extended length of time to produce a molten pool with a low aspect ratio. Near-net shape is achieved by applying the process in a closed-loop, multi-axis material deposition system.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: August 15, 2000
    Assignee: United Technologies Corporation
    Inventors: John Joseph Marcin, Jr., Justin Andreas Neutra, David Henry Abbott, James Peter Aduskevich, Dilip M. Shah, Dorothea Nadette Carraway, Raymond Paul Langevin, Marc R. Sauerhoefer, Richard Alan Stone
  • Patent number: 6102656
    Abstract: A segmented abradable ceramic coating system having superior abradability and erosion resistance is disclosed. The system includes a duct segment having a metallic substrate, a MCrAlY bond coat on the substrate and a segmented abradable ceramic coating on the bond coat. The segmented abradable ceramic coating includes a base coat foundation layer, a graded interlayer and an abradable top layer for an overall thickness of preferably about 50 mils (1.270 mm). The coating is characterized by a plurality of vertical microcracks. By precisely controlling the deposition parameters, composition of the layers and layer particle morphology, segmentation is achieved, as well as superior abradability and erosion resistance.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: August 15, 2000
    Assignee: United Technologies Corporation
    Inventors: David M. Nissley, Harold D. Harter, Daniel R. Godin, George E. Foster
  • Patent number: 6095755
    Abstract: An airfoil having improved fatigue strength is disclosed. The airfoil comprises a tip, a root section, a platform, and an airfoil section located between the tip and the platform. The airfoil section has a leading edge and a trailing edge. A metallic coating is located along the leading edge and the trailing edge excluding a portion of the leading edge and the trailing edge located near the platform.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: August 1, 2000
    Assignee: United Technologies Corporation
    Inventor: David Paul Houston
  • Patent number: 6045863
    Abstract: The invention includes a low activity localized aluminide coating for a metallic article made by positioning a coating material, preferably in the form of a tape, on a portion of the article. The coating material comprises a binder, a halide activator, an aluminum source, and an inert ceramic material. The coating material and the article are heated in an inert atmosphere between about 1800.degree. F. (982.degree. C.) and about 2050.degree. F. (1121.degree. C.) for between about four and about seven hours thereby producing a low activity localized aluminide coating having an outward diffusion aluminide coating microstructure characterized by two distinct zones, an inner diffusion zone and an outer zone including between about 20-28 percent, by weight, aluminum.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: April 4, 2000
    Assignee: United Technologies Company
    Inventors: Walter E. Olson, Norman Pietruska, Peter Jon Draghi
  • Patent number: 6022632
    Abstract: The invention includes a low activity localized aluminide coating for a metallic article made by positioning a coating material, preferably in the form of a tape, on a portion of the article. The coating material comprises a binder, a halide activator, an aluminum source, and an inert ceramic material. The coating material and the article are heated in an inert atmosphere between about 1800.degree. F. (982.degree. C.) and about 2050.degree. F. (1121.degree. C.) for between about four and about seven hours thereby producing a low activity localized aluminide coating having an outward diffusion aluminide coating microstructure characterized by two distinct zones, an inner diffusion zone and an outer zone including between about 20-28 percent, by weight, aluminum.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: February 8, 2000
    Assignee: United Technologies
    Inventors: Walter E. Olson, Norman Pietruska, Peter Jon Draghi
  • Patent number: 6007645
    Abstract: A superalloy composition and single crystal articles of the composition are disclosed. The broad range, in weight percent, is 3.0-20.0% Co, 5.0-10.0% W, 5.0-7.0% Al, 0.4-2.9% Cr, 4.0-8.0% Ta, 0-1.0% V, 0-8.5% Re, 0-1.5% Ti, 0-3.0% Hf, 0-4.0% Mo, 0-2.0% Nb, 0-10.0% of one or more elements selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, 0-1.0 of one or more elements selected from the group consisting of Y, La, Sc, Ce, lanthanides or actinides series of elements, balance essentially Ni. An equation is presented to select the most useful specific compositions from within this range.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: December 28, 1999
    Assignee: United Technologies Corporation
    Inventors: Alan D. Cetel, David N. Duhl
  • Patent number: 5989679
    Abstract: A strong, dimensionally stable object, such as a tooling fixture, is produced by providing a three dimensional, rapid free form fabricated object having a hollow internal cavity and flowing a strengthening material, such as an epoxy resin, into the internal cavity.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: November 23, 1999
    Assignee: United Technologies Corporation
    Inventor: Marc Raymond Sauerhoefer
  • Patent number: 5938863
    Abstract: A high strength nickel base superalloy article having a machined surface is disclosed. The superalloy comprises, in weight percent, 1.2-3.5 Al, 3.0-7.0 Ti, 12.0-20.0 Cr, 2.0-3.9 Mo, 10.0-20.0 Co, 0-4.5 W, 0.005-0.025 C, 0.005-0.05 B, 0.01-0.1 Zr, 0-0.005 Mg, 0-1.0 Ta, 0-1.0 Nb, 0-2.0 Fe, 0-0.3 Hf, 0-0.02 Y, 0-0.1 V, 0-1.0 Re, balance essentially Ni. The superalloy further comprises a plurality of discrete carbides essentially free from molybdenum for increased fatigue strength.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: August 17, 1999
    Assignee: United Technologies Corporation
    Inventor: David R. Malley
  • Patent number: 5935779
    Abstract: The invention relates to methods of performing a binding assay for an analyte of interest present in a sample based upon electrochemiluminescence at an electrode of interest. Particles are employed in the method, which are then collected in a zone at which electrochemiluminescence can be induced, wherein the amount of induced electrochemilurninescence is related to the amount of analyte in the sample.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: August 10, 1999
    Assignee: IGEN International Inc.
    Inventors: Richard J. Massey, Jonathan K. Leland, Haresh P. Shah, John H. Kenten, Jack E. Goodman, George E. Lowke, Yuzaburo Namba, Gary F. Blackburn
  • Patent number: 5922150
    Abstract: An improved method is described for repairing Co-base superalloy gas turbine engine components by applying a mixture of base alloy powder and base alloy powder with a melting point depressant to the surface of the component and heating at 2250-2300.degree. F. to diffuse the melting point depressant isothermally into the base alloy. A protective coating is then applied, during which a heating cycle which ages the base material is used. The resultant component has high temperature creep properties which are significantly better than achieved using the prior art process. The same temperature cycle is also useful in the initial heat treatment of Co-base superalloys, and can also be used for rejuvenation of components which have experienced extensive exposure to engine operating conditions.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: July 13, 1999
    Assignee: United Technologies Corporation
    Inventors: Norman Pietruska, S. Michael Kurpaska
  • Patent number: 5879836
    Abstract: A lithium battery characterized in that the anode (1) is formed from a carbon fibril material comprised of an aggregate of fibrils or non-aggregated mass of fibrils having an average particle diameter of 0.1 to 100 microns in which fine, filiform carbon fibrils of 3.5 to 75 nm an in diameter are intertwinned with each other, and fibrils being intercalated with lithium. The cathode (3) also contains carbon fibrils.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 9, 1999
    Assignee: Hyperion Catalysis International Inc.
    Inventors: Hiroharu Ikeda, Robert Hoch, Robert Hausslein
  • Patent number: 5858172
    Abstract: Wood pulp sheets treated with triacetin and other compounds, or solutions or emulsions of same, having increased softness while maintaining absorbency, and methods for producing same. More particularly, the invention relates to the treatment of wood pulp useful for making a fluff pulp using a softening agent including alkyl ethers, aryl ethers and formic, ethanoic and propanoic esters of low molecular weight glycols, such as triacetin, propylene glycol diacetate and 2-phenoxyethanol.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: January 12, 1999
    Assignee: Rayonier Inc.
    Inventors: Karl D. Sears, Peter R. Abitz