Patents Examined by Mark Bell
  • Patent number: 6342465
    Abstract: A process for preparing a catalyst which has a catalytically active coating of high surface area finely divided materials and catalytically active components on an inert carrier structure. A powder mixture of the finely divided materials used is impregnated with a solution of precursor compounds of the catalytically active components. By suitable combination of the finely divided materials and the precursor compounds and appropriate management of the impregnation process, a highly dispersed deposition and adsorption of the catalytically active components is ensured on the finely divided materials. Then ai aqueous coating dispersion is produced using the impregnated powder mixture and the carrier structure is coated therewith. The coating is then dried and calcined.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: January 29, 2002
    Assignee: DMC2 Degussa Metals
    Inventors: Harald Klein, J├╝rgen Leyrer, Rainer Domesle, Egbert Lox, Thomas Kreuzer
  • Patent number: 5304245
    Abstract: A acid-curing coating composition which is improved in pigment dispersibility, which is free from the formation of aggregates, free from the substantial growth of a crystal and excellent in fluidity, and which gives a coating having a clear color tone and high gloss, the coating composition comprising a pigment composition containing 100 parts by weight of a pigment and 0.5 to 30 parts by weight of a sulfonic acid group-containing anthraquinone compound or its metal salt, and an acid-curing paint varnish.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: April 19, 1994
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Akimitsu Mochizuki, Michichika Hikosaka
  • Patent number: 5082500
    Abstract: A sprayable composition and a method of protecting material with the composition is disclosed. The composition comprises a polymer such as hydroxyethyl cellulose, clay, and water to provide a cover layer which, after spraying, is tough, flexible and water-repellent. Other materials such as shredded paper and gypsum can be used in the cover layer. The composition is effective as a cover layer over material such as soil, refuse at a dump site, or grain in a stockpile.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: January 21, 1992
    Assignee: Newastecon, Inc.
    Inventors: Thomas Nachtman, John Hull, Patrick O'Shea
  • Patent number: 4642297
    Abstract: Optical glass compositions having refractive indexes of 1.60-1.69 and Abbe numbers higher than 54 as well as with a density of less than 3.4 g/cm.sup.3, and which are distinguished in that they have good chemical stability, comprising (in percent by weight): 5-30 percent SiO.sub.2 ; 20-55 percent B.sub.2 O.sub.3 ; 13-40 percent CaO; 3-25 percent La.sub.2 O.sub.3 ; and optionally one or more of the following: up to 7 percent ZrO.sub.2, up to 2 percent TiO.sub.2, up to 9 percent Al.sub.2 O.sub.3, up to 11 percent MgO, up to 10 percent ZnO, up to 10 percent SrO, and up to 12 percent BaO.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: February 10, 1987
    Assignee: Schott Glaswerke
    Inventors: Karl Mennemann, Danuta Grabowski geb. Marszalek
  • Patent number: 4526874
    Abstract: An optical glass with the familiar optical position of n.sub.d >1.70 and v.sub.d >22, which differs from the familiar optical glasses of the optical position due to its lower density and good chemical stability, and is composed of (in percent by weight): SiO.sub.2 25-42, TiO.sub.2 15-35, B.sub.2 O.sub.3 0.5-7, BaO 3-13, CaO 1-3, Nb.sub.2 O.sub.5 1-20, GeO.sub.2 0-2, Al.sub.2 O.sub.3 0-4, Na.sub.2 O 7.5-15, Li.sub.2 O 0-9, K.sub.2 O 2-10, SrO 0-6, ZnO 0-5, ZrO.sub.2 0-3, and WO.sub.3 0-3.
    Type: Grant
    Filed: April 27, 1983
    Date of Patent: July 2, 1985
    Assignee: Schott Glaswerke
    Inventors: Danuta Grabowski geb. Marszalek, Ludwig Ross, Volkmar Geiler, Karl Mennemann
  • Patent number: 4522927
    Abstract: A dielectric ceramic composition having a composition represented by the formulaxBaO-yNd.sub.2 O.sub.3 -z(Ti.sub.1-m Zr.sub.m)O.sub.2wherein x+y+z=1.000<m.ltoreq.0.25and x, y, and z are in the molar ratio region surrounded by the points a, b, c, and d which are represented by the following x-y-z coordinates:______________________________________ x y z ______________________________________ a 0.15 0.12 0.73 b 0.15 0.18 0.67 c 0.05 0.18 0.77 d 0.05 0.12 0.
    Type: Grant
    Filed: October 26, 1983
    Date of Patent: June 11, 1985
    Assignees: Mitsubishi Mining, Cement Company Ltd.
    Inventors: Masao Kashima, Noboru Tomuro
  • Patent number: 4521357
    Abstract: Refractory brick comprising a refractory aggregate, carbonaceous material and powdered metal bonded with a combination of liquid thermosetting resin and impregnating pitch.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: June 4, 1985
    Assignee: Dresser Industries, Inc.
    Inventors: Mark C. Kernion, Albert L. Renkey
  • Patent number: 4521358
    Abstract: Processes for the production of a silicon nitride sintered body are disclosed. One process comprises molding a mixed powder of 100 parts by weight of metallic silicon with a maximum particle size of 20 .mu.m or less and 0.2 to 2 parts by weight (calculated as chromium oxide) of a chromium component and, thereafter, reaction sintering the mold in a nitrogen gas or in a non-oxidizing atmosphere containing nitrogen gas at a temperature of 1,300.degree. to 1,500.degree. C. This invention provides further process which comprises molding a mixed powder of 100 parts by weight of metallic silicon with a maximum particle size of 20 .mu.m or less, 0.2 to 1 part by weight (calculated as chromium oxide) of a chromium component, and further 10 to 20 parts by weight of an oxide component of one or more of the oxides of yttrium, lanthanum, cerium, gadolinium, and erbium, reaction sintering the above-prepared mold, and thereafter, hot pressing the reaction sintered body.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: June 4, 1985
    Assignee: Agency of Industrial Science & Technology
    Inventors: Kazunori Miura, Yoshinori Hattori, Yasushi Matsuo
  • Patent number: 4513089
    Abstract: A superrefractory dry ramming material based on zirconium oxide for the lining of induction-type crucible furnaces comprising a zirconium oxide low in SiO.sub.2 and conventionally stabilized with CaO, MgO, Y.sub.2 O.sub.3, rare earths or their mixed oxides which has a particle size ranging from 0 to 8 mm, and from 5 to 40 weight percent finely divided monoclinic, fused zirconium oxide containing less than 0.5 weight percent SiO.sub.2.
    Type: Grant
    Filed: October 25, 1983
    Date of Patent: April 23, 1985
    Assignee: Dynamit Nobel AG
    Inventors: Peter Kummer, Gerhard Rehfeld
  • Patent number: 4511665
    Abstract: Disclosed is a decorative hard golden article comprising at least one member selected from titanium nitride and zirconium nitride as a main component and 0.1 to 30% by weight of at least one member selected from alumina (Al.sub.2 O.sub.3) and zirconia (ZrO.sub.2).In this decorative hard golden article, the corrosion resistance is highly improved while the flexural strength and hardness are maintained at high levels.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: April 16, 1985
    Assignee: Kyocera Corporation
    Inventors: Yoshio Nagato, Kazunori Soroi
  • Patent number: 4510252
    Abstract: A devitrification resistant, sulfuric acid resistant and water resistant glass fiber consisting essentially of SiO.sub.2, Al.sub.2 O.sub.3, CaO, MgO, Na.sub.2 O and/or K.sub.2 O, B.sub.2 O.sub.3, and optionally Fe.sub.2 O.sub.3, and/or TiO.sub.2 and/or F.sub.2, said glass fiber having delta T of at least about 395.degree. F. and a durability (% fiber weight loss at 96.degree. C.) in water for 24 hours of less than about 1.6% and in 10% H.sub.2 SO.sub.4 for 24 hours of less than about 1.1%.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: April 9, 1985
    Assignee: Owens-Corning Fiberglas Corporation
    Inventor: Russell M. Potter
  • Patent number: 4507392
    Abstract: This invention is directed to the production of glass-ceramic materials designed for application as glazes to low expansion ceramic bodies. The inventive glass-ceramics exhibit average coefficients of thermal expansion (25.degree.-100.degree. C.) of less than -15.times.10.sup.-7 /.degree.C., demonstrate excellent resistance to attack by acids and bases, contain beta-quartz solid solution as the predominant crystal phase, and consist essentially, in weight percent, of______________________________________ SiO.sub.2 50-67 Al.sub.2 O.sub.3 22-32 Li.sub.2 O 4.5-7 TiO.sub.2 and/or ZrO.sub.2 4.
    Type: Grant
    Filed: December 8, 1983
    Date of Patent: March 26, 1985
    Assignee: Corning Glass Works
    Inventor: Hermann L. Rittler
  • Patent number: 4507393
    Abstract: An ophthalmic glass particularly useful as a segment glass consists essentially of, in weight percent:______________________________________ SiO.sub.2 23-32 B.sub.2 O.sub.3 4-7 Al.sub.2 O.sub.3 0.5-3 BaO 23-30 PbO 15-30 TiO.sub.2 0.5-10 La.sub.2 O.sub.3 5-20 Nb.sub.2 O.sub.5 0-1.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: March 26, 1985
    Assignee: Schott Glass Technologies, Inc.
    Inventors: Reinhard Kassner, Karl-Heinz Mader, Lee M. Cook
  • Patent number: 4502983
    Abstract: A composite silicon carbide sintered shape is provided in two forms in which the former form includes rare earth oxides as a sintering assist, and the latter form includes rare earth oxides and/or aluminum oxide or boron oxide as a sintering assist, characterized in that both forms have a surface layer abundant in rare earth oxides. Methods for manufacturing such sintered shapes are also provided.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: March 5, 1985
    Assignee: Mamoru Omori
    Inventors: Mamoru Omori, Humihiko Takei
  • Patent number: 4501723
    Abstract: A method of making a powder additive consisting of yttrium silicon oxynitrides, preferably of the Y.sub.10 Si.sub.6 O.sub.24 N.sub.2 or YSiO.sub.2 N phases, is disclosed. Stoichiometric amounts of Y.sub.2 O.sub.3, SiO.sub.2, and Si.sub.3 N.sub.4 are mixed and arranged in intimate reactive contact, the amounts being to form a desired oxynitride according to the formula Y.sub.a Si.sub.b O.sub.c N.sub.d, where a, b, c and d represent the required element parts of the compound in equilibrium with the mixture elements. The mixture is heated in an inert atmosphere to a temperature and for a time sufficient to convert the stoichiometric amounts of the mixture to the desired yttrium silicon oxynitride. The heat agglomerated mixture is then ground to a powder.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: February 26, 1985
    Assignee: Ford Motor Company
    Inventors: Andre Ezis, Howard D. Blair
  • Patent number: 4501819
    Abstract: According to one aspect of the invention, there is provided glass for a photomask consisting, in weight percent, of 45 to 62% SiO.sub.2, 3 to 15% B.sub.2 O.sub.3, 12 to 25% Al.sub.2 O.sub.3, 5 to 15% MgO, 0 to 5% CaO, 0 to 5% SrO, 0 to 5% BaO, 0 to 5% ZnO, 0.5 to 5% PbO, 0 to 20% La.sub.2 O.sub.3 +Gd.sub.2 O.sub.3 +Y.sub.2 O.sub.3, 0 to 1.5% Na.sub.2 O, 0 to 1.5% K.sub.2 O, 0 to 0.5% As.sub.2 O.sub.3 and 0 to 6% Sb.sub.2 O.sub.3. This glass is easy to melt and homogenize and has good resistivity to phase separation and excellent heat resisting and refractory properties, chemical durability, ultraviolet transmittance and metal vapor deposition property. According to another aspect of the invention, there is provided glass for a photomask consisting, in weight %, 45 to 60% SiO.sub.2, 0.5 to 12% B.sub.2 O.sub.3, 10 to 22% Al.sub.2 O.sub.3, 5 to 17% MgO, 0 to 5% CaO, 0 to 8% SrO, 1.5 to 15% BaO, 1.5 to 17% ZnO, 0.5 to 10% PbO, the total content of ZnO and PbO being at least 6%, 0 to 7% Ta.sub.2 O.sub.5 +Nb.sub.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: February 26, 1985
    Assignee: Kabushiki Kaisha Ohara Kogaku Garasu Seizosho
    Inventors: Hisao Yatsuda, Mutsumi Miyazaki
  • Patent number: 4500942
    Abstract: Multilayer ceramic capacitors, and in particular NPO class capacitors are produced from dielectric compositions comprising a mixture of BaO, PbO, Nd.sub.2 O.sub.3, Bi.sub.2 O.sub.3, TiO.sub.2 and one of the rare earth oxides selected from the group consisting of Pr.sub.6 O.sub.11 and Sm.sub.2 O.sub.3, the selected rare earth oxide being present in an amount ranging from approximately 10 to 100 wt. % of the amount of Nd.sub.2 O.sub.3 in the mixture. In one embodiment an acrylic binder is added to the mixture to produce ceramic sheets which are screen printed with a Pt-Pd-Au electrode, and then cut into thin layers, stacked, laminated, sintered and terminated to produce a multilayer capacitor having an extremely stable TC and effective dielectric constant as high as 120.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: February 19, 1985
    Assignee: Ferro Corporation
    Inventor: James M. Wilson
  • Patent number: 4499192
    Abstract: A silicon nitride sintered product and processes for the production thereof are described, wherein the product comprises from 75 to 97.9% by weight of silicon nitride, from 2 to 20% by weight of yttrium oxide and cerium oxide in a molar ratio of cerium oxide to yttrium oxide of 0.4/1 to 4/1, and from 0.1 to 8% by weight of aluminum oxide.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: February 12, 1985
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Toru Shimamori, Yoshinori Hattori, Yasushi Matsuo
  • Patent number: 4497901
    Abstract: A forsterite-carbon refractory containing forsterite material, carbonaceous material, silicon carbide and magnesia refractory material.
    Type: Grant
    Filed: January 6, 1983
    Date of Patent: February 5, 1985
    Assignees: Nippon Steel Corporation, Kyushu Refractories Co., Ltd.
    Inventors: Yuzo Ohtsuki, Nobiru Komatsu, Akira Watanabe, Gouji Saeki
  • Patent number: 4497660
    Abstract: In material applications in which besides a high wear resistance also excellent corrosion resistance, strength and toughness are required, conventional hard metal alloys have appeared inadequate. According to the invention a hard metal alloy now exists which fulfils these requirements. It is based on WC-Ni, and the binder phase of nickel is alloyed with low, well adjusted concentrations of above all Cr and Mo.
    Type: Grant
    Filed: March 13, 1984
    Date of Patent: February 5, 1985
    Assignee: Santrade Limited
    Inventor: Leif Lindholm