Patents Examined by William R. Dixon, Jr.
  • Radio-opaque calcium phosphate glass
    Patent number: 5162267
    Abstract: A biocompatible, strong, radio-opaque high melting glass is obtained by reacting at the melt mono-basic calcium phosphate with phosphoric acid and a radio-opaque-imparting component such as bismuth oxide (Bi.sub.2 O.sub.3) or barium oxide (BaO). After soaking, cooling and drying, the glass may be ground to desired particle size, and is admirably suited for use as a filler, binder, or structural mass in the dental and medical fields.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: November 10, 1992
    Inventor: Milagros B. Smyth
  • Structural ceramics incorporating boron carbide whiskers for the strengthening thereof
    Patent number: 5162270
    Abstract: Ceramic composites, and in particular structural ceramic composites, have enhanced strength, toughness and abrasion resistance due to the presence of up to about 40 volume percent of relatively large boron carbide whiskers. Although whiskers of various sizes were studied, those of particular interest are whiskers having an average diameter greater than about 3 micrometers, and particularly about 5 to about 8 micrometers, with an average aspect ratio of about 50. Due to the larger size, which had been predicted to be detrimental, there is less respiratory health risk when using these whiskers in the manufacturing of thse improved ceramic composites. Since boron carbide whiskers have many properties superior to silicon carbide whiskers, the most common strengthening agent, the findings should lead to several improved ceramic composites.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: November 10, 1992
    Assignee: Third Millennium Technologies, Inc.
    Inventors: P. Darrell Ownby, Jeng Liu
  • Electroless plating bath
    Patent number: 5160373
    Abstract: An electroless plating bath for depositing a metal selected from the group consisting of Ni, Zn, As, Cd, In, Sb, Pb and alloys thereof, which contains a titanium (III) compound as a reducing agent. Typical titanium (III) compounds are titanium halides, cyclopentadienyl complex compounds of titanium (III) ions, titanium sulfate, and titanium hydroxide.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: November 3, 1992
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Atsuo Senda, Takuji Nakagawa, Yoshihiko Takano
  • Cement setting accelerator and method of manufacturing the same
    Patent number: 5160376
    Abstract: The present invention provides a cement setting accelerator comprising 100 parts by weight of a sintered body, 5 to 70 parts by weight of an alkali metal carbonate powder and at most 170 parts by weight of a lime powder and a method of manufacturing the same. The sintered body contains a predetermined ratio of 3CaO.2Na.sub.2 O.5Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and Na.sub.2 O.Al.sub.2 O.sub.3. Alternatively, a predetermined ratio of 3CaO.2Na.sub.2 O.5Al.sub.2 O.sub.3, Na.sub.2 SO.sub.4 and 4CaO.3Al.sub.2 O.sub.3.SO.sub.3 are contained in the sintered body. Further, a raw material mixture, which is not sintered and equal in the chemical composition to the sintered body noted above, may be used in place of the sintered body. Setting and hardening of a cement paste is markedly promoted by adding a small amount of the cement setting accelerator of the present invention to the cement paste.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: November 3, 1992
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Masatsune Kikuchi, Hiroshi Omori, Hatsutoshi Hosoda, Susumu Kouda
  • Recording liquid and ink-jet recording method making recording unit, ink cartridge, and ink-jet recording apparatus making use thereof
    Patent number: 5160370
    Abstract: A recording liquid including a pigment, a water-soluble resin, a water-soluble organic solvent, and water, wherein, of the water-soluble resin, water-soluble resin that is in the state of being dissolved in the recording liquid without being absorbed on the pigment is contained in an amount of not more than 2% by weight; and the water-soluble organic solvent comprises at least one of a polyhydric alcohol and an alkyl ether thereof, and an aliphatic monohydric alcohol. This recording liquid is used in an ink-jet recording method, recording unit, ink cartridge, and ink-jet recording apparatus.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: November 3, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuko Suga, Hiromichi Noguchi
  • Aqueous ink jet inks containing ester diol and amide diol cosolvents
    Patent number: 5160372
    Abstract: An ink for ink jet printers which comprises an aqueous carrier medium, pigment dispersion or dye and an amide diol or ester diol cosolvent penetrant such as hydroxypivalyl hydroxypivalate. The cosolvent penetrant has a solubility in water of at least 4.5 parts in 100 parts of water at 25.degree. C.The pigment dispersion consists of pigment particles and a dispersant, preferably a polymeric dispersant, having a hydrophilic segment and a segment that links to the pigment. These inks exhibit rapid drying, have excellent decap performance, are storage stable and give images having good print quality.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: November 3, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Howard Matrick
  • Rapidly drying impulse ink jet ink compositions
    Patent number: 5160535
    Abstract: Impulse-type ink jet ink compositions and processes for recording information therewith are provided. The ink compositions dry to the touch more rapidly than the impulse-type inks known in the art. The rapid-drying characteristics are believed to be attributable to their relatively low viscosities. The ink compositions preferably comprise from about 80 to about 99 percent by weight of a liquid vehicle which consists essentially of an organic solvent having a viscosity less than about 7.0 centipoise at 20.degree. C. and from about 1 to about 15 percent by weight of a colorant. The ink compositions are suitable for printing alphanumeric text or bar codes on highly calendared paper or other non-absorbent surfaces.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: November 3, 1992
    Assignee: Trident, Inc.
    Inventors: Theodore M. Cooke, Wilfred F. Reed
  • Display composition, coloring pigment, and recording material
    Patent number: 5160371
    Abstract: Disclosed herein is a display composition which comprises a dye and a clay mineral in which quaternary ammonium ions are bound between layers through ion exchange, said display composition undergoing reversible color development and color fading through the oxidation and reduction of said dye, the oxidation causing said dye to form a color and to be bound between the layers of said clay mineral through ion exchange with said quaternary ammonium ions, the reduction causing the dye to discolor and to be desorbed out of the interlaminar space of the clay mineral and also causing the quaternary ammonium ions to be bound again between the layers through ion exchange. Disclosed also herein are a coloring pigment and recording material which employ the display composition.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: November 3, 1992
    Assignee: Sony Corporation
    Inventor: Kengo Ito
  • Method and product of fly ash benefication by carbon burnout in a dry bubbling fluid bed
    Patent number: 5160539
    Abstract: This invention relates to an apparatus, method and product wherein fine particles of fly ash containing carbon are oxidized in a dry, bubbling fluid bed of previously introduced fine particles of the same fly ash so that the subsequently removed particles have reduced carbon content and are useful as pozzolan, suitable for use, without further processing, to replace a portion of the cement in concrete. The preferred conditions are a temperature of about 1300.degree. to 1800.degree. F., air velocity of between at least about 0.5, but not more than about 3 ft./sec., residence time of at least about 2 minutes but up to 100 minutes, volume ratio of air to fly ash of between about 1,000 and 1500, and an excess of oxygen between about 5% and 15%.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: November 3, 1992
    Assignee: Progress Materials Inc.
    Inventor: Joseph W. Cochran
  • Mechanically erasable ballpoint ink
    Patent number: 5160369
    Abstract: The present invention provides ballpoint pen ink compositions containing carbon black which are initially erasable and require little or no external pressure for ink delivery. The ink can be erased easily with a normal rubber eraser such as that found on pencils. The ink compositions of the present invention comprises: about 15% to about 40% of an aliphatic hydrocarbon, about 15% to about 40% of an aromatic hydrocarbon, about 1% to about 15% of a colorant, about 4% to about 40% of one or more of a preselected thermoplastic block copolymer, and about 5% to about 40% of a preselected parting agent.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: November 3, 1992
    Assignee: SRI Inc.
    Inventors: Dean B. Parkinson, Orton D. Bergren
  • Sol/gel polymer surface coatings and corrosion protection enhancement
    Patent number: 5158605
    Abstract: Corrosion inhibiting properties in surface coating compositions are increased by admixing a sol or gel containing salt with a polymer and usually a surface coating paste stock. A novel surface coating composition containing a polymer and salt homogeneously distributed in the composition is prepared from the sol or gel and has increased corrosion-inhibiting properties compared to a composition without the admixed sol or gel.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: October 27, 1992
    Assignee: Union Oil Company of California
    Inventor: Charles L. Kissel
  • Solid oxide fuel cells
    Patent number: 5158837
    Abstract: A solid oxide fuel cell including a bottomprovided cylindrical solid oxide fuel cell element including at least an air electrode, a solid electrolyte and a fuel electrode, a gas feed pipe inserted into a cylindrical space and having a gas feeding portion for feeding an oxidizing gas or a fuel gas into the cylindrical space of the solid oxide fuel cell element. The gas feeding portion is provided at least in a lateral face of the gas feed pipe. Instead of or in addition to the gas feeding portion being provided in the lateral face of the gas feed pipe, a permeating amount of the gas passing through that portion of the porous cylindrical support tube which faces an upstream side of a stream of the gas flowing through the cylindrical space is made smaller than that of the gas passing through that portion of the porous cylindrical support tube which faces a downstream side of the gas stream.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: October 27, 1992
    Assignee: NGK Insulators, Ltd.
    Inventors: Hidenobu Misawa, Hirotake Yamada
  • Anticorrosive pigments on the basis of tertiary alkaline-earth aluminum phosphates and a process for the production thereof
    Patent number: 5158610
    Abstract: The present invention provides anticorrosive pigments on the basis of tertiary alkaline-earth aluminum phosphates, particularly those where the numerical atomic ratio x:y:z of formula AE.sub.x Al.sub.y (PO.sub.4).sub.z of alkaline earth to aluminum to phosphorus or phosphate is 50-70% to 5-30% to 20-50%. It also provides a process for their production in which an alkaline-earth compound and aluminum compound sufficiently soluble with phosphoric acid are reacted with phosphoric acid, the precipitated pigment is filtered off as usual and dried, optionally calcined and optionally ground.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: October 27, 1992
    Assignee: Dr. Hans Heubach GmbH & Co. KG
    Inventor: Annegret Bittner
  • Paper coating composition
    Patent number: 5158611
    Abstract: A process for producing a resin is disclosed, comprising reacting (a) a polyalkylenepolyamine, (b) an alicyclic dibasic carboxylic acid and/or a reaction product having a free carboxyl group that is obtained by reacting an alicyclic dibasic carboxylic acid with a glycol, (c) a urea, and (d) an aldehyde and/or an alkylating agent. The resulting resin is useful as a wet strength agent to provide a paper coating composition having improved printability and printing effects.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: October 27, 1992
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Shigeru Ura, Haruo Tanaka, Hisao Takagishi, Yoshiya Fukuyama, deceased, Hiroko Fukuyama, heir, Takuya Fukuyama, heir, Yuko Fukuyama, heir
  • Cement slurry
    Patent number: 5158613
    Abstract: Hydraulic high density cement slurry, especially for cementation of oil/gas-wells. The slurry contains 30-45 weight % microsilica based on the cement weight and water to a density of 1.9-3.5 g/cm.sup.3. If desired there can be added dispersant, retarder and weighting agent. Microsilica acts as a fluid-loss preventing agent. The addition of microsilica prevents strength retrogression at temperatures above 120.degree. C. and acts as a mechanical stabilizer for the cement slurries. A method for production of the cement slurry is also described.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: October 27, 1992
    Assignee: Norsk Hydro a.s.
    Inventors: Jon P. Sargeant, Oystein Kalvenes, Asbjorn Vonheim
  • Water based aerosol marking paint
    Patent number: 5158609
    Abstract: An improved water based aerosol paint is particularly well-suited for use in site marking applications. Its high content of calcium carbonate provides a support for the pigment and resin film. A straight chain, low molecular weight hydrocarbon with between 5 and 8 carbons is used to control foaming.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: October 27, 1992
    Assignee: Aervoe Pacific Company, Inc.
    Inventor: Paul J. O'Neill
  • Magnesia-based sintered body and process for preparing same
    Patent number: 5158915
    Abstract: A magnesia-based sintered body of a homogeneous composition having a porosity lower than 1% and a hydrateability lower than 0.3%, said sintered body having a chemical composition comprising 70 to 99.9% by weight of magnesia and 30 to 0.1% by weight of at least one oxide selected from the group consisting of titanium oxide, aluminum oxide, ferric oxide, phosphorus pentoxide, yttrium oxide, barium oxide, boron oxide, calcium oxide and lithium oxide. The sintered body is obtained by molding a powdery mixture of magnesia and the oxide other than magnesia.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: October 27, 1992
    Assignee: Ube Industries, Ltd.
    Inventors: Mitsuhiko Morita, Yoshio Yoshimoto, Tatsuhiko Matsumoto
  • Low rub printing ink
    Patent number: 5158606
    Abstract: A printing ink composition having a high degree of rub-off resistance comprising (a) a dispersion of a pigment in a vehicle containing a C.sub.7 -C.sub.40 oil and (b) a polymer latex emulsified in said dispersion. When employed for printing at high speeds, an anti-misting compound such as tridecyl acid phosphate, phosphoric acid, glycerol, or propylene carbonate is preferentially added to the ink composition. Where cost is not of paramount concern, a polytetrafluoroethylene wax is preferentially added to the ink composition.
    Type: Grant
    Filed: March 6, 1991
    Date of Patent: October 27, 1992
    Assignee: Sun Chemical Corporation
    Inventors: Daniel J. Carlick, Robert W. Bassemir, Ramasamy Krishnan, Richard R. Durand, Jr.
  • Coating with organic dyes
    Patent number: 5156678
    Abstract: Effect pigments based on interference pigments coated with phthalocyanine or metal phthalocyanine dyes, characterized in that the dyes are applied to the pigments as a strongly adhering film without the aid of binders or other auxiliary materials, are outstandingly suitable for use in formulations such as paints, dyes, plastics and cosmetics.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: October 20, 1992
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventor: Ralf Glausch
  • Ink for ink jet printing
    Patent number: 5156675
    Abstract: Fast drying ink compositions contain a colorant, a dye, water and a cosolvent. Some of the ink compositions dry in less than about 1 second and have a viscosity of between about 1.6 and about 2.5 centipoise and a specified surface tension. Some of the ink compositions contain specified cosolvents, preferably a mixture of diethylene glycol monobutyl ether and glycerol.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: October 20, 1992
    Assignee: Xerox Corporation
    Inventors: Marcel P. Breton, Fatima M. Pontes, Kerstin M. Henseleit, Barbel Helbrecht, Melvin D. Croucher, Raymond W. Wong