Patents Examined by J. V. Howard
  • Method of making a blistered silicate material
    Patent number: 4119434
    Abstract: A process for the manufacture of a blistered silicate material having a high content of wollastonite and a low content of cristobalite and containing up to 30 to 40 percent by volume of fine blisters the size of a majority of which are 0.1 to 1mm with a substantial proportion being below 0.1mm wherein raw materials for the silicate material are introduced partly at the upper end of an inclined rotary kiln and partly at the lower end of the rotary kiln, whereby the materials will be distributed in the burning zone and melt.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: October 10, 1978
    Inventor: Karl Kristian Kobs Kroyer
  • Pigment composition
    Patent number: 4119478
    Abstract: A pigment composition comprising a pigment and a colorless compound containing one or more basic nitrogen atoms directly attached to a carbon atom in a pyridine or benzimidazole ring system and having one or more urea or urethane groups which composition shows improved rheology and final application properties such as better flow properties, color strength, gloss and flocculation resistance.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: October 10, 1978
    Assignee: Ciba-Geigy Corporation
    Inventor: George Heddle Robertson
  • Process for producing clay slurries
    Patent number: 4118246
    Abstract: Disclosed is a novel process for manufacturing stable, fluid highly concentrated dispersed aqueous suspensions of calcined clay. The process utilizes the micromixer described in U.S. Pat. No. 3,806,052 to Edward H. Cumpston, Jr. Dry calcined clay is fed to the inlet hopper of the micromixer and mixed with water and one or more conventional clay dispersants before the clay enters the centrifugal zone of the micromixer. A smooth but extremely dilatant paste is discharged from the mill after this first pass. The paste is then recirculated through the micromixer a plurality of times at a higher throughput rate than that used in the first pass.
    Type: Grant
    Filed: September 22, 1977
    Date of Patent: October 3, 1978
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: John P. Horzepa, David E. Potts
  • Process for producing dicalcium silicate power
    Patent number: 4118227
    Abstract: An improved process for producing .gamma.-dicalcium silicate powder which is fine and has a uniform particle size. The .gamma.-dicalcium silicate power has a great ability to capture hydrogen halides and low hygroscopcity, and is useful as a stabilizer for halogen-containing synthetic resins and a filler for synthetic resins.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: October 3, 1978
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tomoo Shiohara, Minoru Miyamoto, Nobuo Tamaki
  • Method for producing clay slurries
    Patent number: 4118245
    Abstract: Method for manufacturing a stable, fluid, highly concentrated aqueous suspension of calcined clay which has satisfactory rheological properties and calcined clay particles having desirable low abrasiveness. A dispersed fluid aqueous suspension of the clay containing about 50 to 55% solids is recirculated through one or more vertical agitated mills containing a particulate grinding medium such as 1/16-inch zirconia spheres. Portions of dry calcined clay are added in increments to the suspension during recirculation until the desired high clay solids level, usually 60 to 70%, is obtained.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: October 3, 1978
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: Herbert R. Hamill, David E. Potts
  • Suspensions of reactive acidic clay pigments
    Patent number: 4118247
    Abstract: AMP (2-amino, 2-methyl, 1-propanol) or a related amino hydroxy compound is used with a sodium condensed phosphate dispersant in the preparation of stable aqueous suspensions of acidic, acid-treated montmorillonite clay pigment particles. The suspensions are used in the manufacture of carbonless copying paper.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: October 3, 1978
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: Francis R. Marchetti, William E. Zentz, Richard R. Berube
  • Powdery pearlescent pigment composition
    Patent number: 4116628
    Abstract: Powdery pearlescent pigment compositions comprising individual particles of a flaky nacreous pigment coated with 1 to 50 weight percent of a solid polymer, optionally containing wetting agents, fillers, additional coloring agents, UV-absorbers or scenting agents, are produced by combining a suspension of a flaky nacreous pigment with a solution of a polymer, possibly containing other substances, and subsequently depositing polymer on the pigment flakes. The compositions can be used as pigments in cosmetics and can be stored and shipped as dry powders without loss of properties.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: September 26, 1978
    Assignee: E. Merck
    Inventors: Reiner Hesse, Hans Pratzer, Manfred Kieser, Gerhard Edler
  • Dust-free thermally stable lead chromate pigment composition and process of preparation
    Patent number: 4115143
    Abstract: Substantially non-dusting, thermally stable lead chromate pigment composition consisting essentially of lead chromate pigment and at least one organic ester selected from esters of phthalic and terephthalic acids and esters of fatty acids and process of preparation by forming a mixture of lead chromate pigment and water and intimately contacting the mixture with at least one organic ester. The lead chromate pigment composition can be poured, packaged, or otherwise processed in dry form with the formation of far less dust in the work environment than is encountered using conventional lead chromate pigment and exhibits high thermal stability in plastics.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: September 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kenneth Batzar
  • Pigmentary bright primrose yellow monoclinic bismuth vanadate and processes for the preparation thereof
    Patent number: 4115142
    Abstract: A pigmentary, bright primrose yellow monoclinic bismuth vanadate and processes for the preparation thereof by reacting bismuth nitrate with an alkali vanadate under controlled conditions to obtain a bismuth vanadate gel followed by aqueous digestion or calcination to produce pigmentary, bright primrose yellow monoclinic bismuth vanadate.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: September 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard William Hess
  • Process for the preparation of pigmentary bright primrose yellow bismuth vanadate
    Patent number: 4115141
    Abstract: Process for the preparation of pigmentary primrose yellow bismuth vanadate by reacting bismuth nitrate with an alkali vanadate under controlled conditions to obtain a bismuth vanadate gel which is then subjected to aqueous digestion to produce pigmentary monoclinic bismuth vanadate.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: September 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Douglas Howard Piltingsrud
  • Method of preparing metal oxide slurries
    Patent number: 4115144
    Abstract: A high solids metal oxides coated titanium dioxide aqueous slurry requires a negative charge and a high pH for use in aqueous paint media. A hot ageing of the coated titanium dioxide can alter the isoelectric point of the slurry and make practicable the avoidance of mixtures of metal oxide coating agents which give rise to processing difficulties and the use of mixtures of metal oxides which would not without the hot ageing step give suitable charge and pH characteristics. An example of a suitable mixture of metal oxide coating agents is a 1:1 molar Al.sub.2 O.sub.3 : TiO.sub.2 mixture. An example of hot ageing conditions is the use of a temperature of 98.degree. C - 100.degree. C for 1 hour while avoiding loss of water and under alkaline conditions.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: September 19, 1978
    Assignee: Laporte Industries Limited
    Inventors: Hubert Harold Chambers, Brian John Tear
  • Iron blue pigment composition and process for its production
    Patent number: 4113508
    Abstract: The production of iron blue pigment compositions by a flushing process has been found to be improved by carrying out the flushing step in the presence of an amine flushing agent and incorporating into the composition during or after flushing at least one surfactant of the polyoxyethylene type. The resulting iron blue compositions have improved consistency and dispersibility in printing inks, paints and the like.
    Type: Grant
    Filed: June 23, 1977
    Date of Patent: September 12, 1978
    Assignee: Hercules Incorporated
    Inventors: Johan Jozef Einerhand, Leonardus Johannes Hubertus Erkens, Rene Johannes Laenen, Joseph Wilhelmus Jacobus Hoofs
  • Temporary sealant of a nozzle opening of sliding nozzle
    Patent number: 4113501
    Abstract: A temporary sealant of a nozzle opening of sliding nozzle, which is in the form of either coarse particle or molding and which consists of 92.0 to 98.8% by weight of a non-porous refractory material having a particle size distribution of more than 95% of approximately particle diameter 2.0 - 0.8 mm, 1 to 5% by weight of a carbonaceous material having particle size of less than 0.15 mm, and 0.2 to 3.0% by weight of an organic tackifier.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: September 12, 1978
    Inventor: Yoshito Edamoto
  • Hollow spheres
    Patent number: 4111713
    Abstract: Novel hollow spheres are made by tumbling solidifiable liquid globules of binder material in a mass of minute solid discrete free-flowing particles. The particles serve as a parting agent during the tumbling action, keeping the globules separate from one another, and become at least partially absorbed into the globules. As the tumbling proceeds, the globules are first converted to a hollow, generally spherical condition by the action of a volatile void-forming agent in the binder material, and then solidify. The new hollow spheres made by this process have a solidified seamless exterior wall that carries at least on its exterior surface partially embedded, partially protruding parting agent particles, and usually is filled throughout at least a major portion of its thickness by parting agent particles.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: September 5, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Warren R. Beck
  • Novel 2-hydroxynaphthalene-1-aldehydes, process for preparing them and their use
    Patent number: 4110375
    Abstract: Novel 2-hydroxynaphthalene-1-aldehydes have been found which have the general formula (I) ##STR1## wherein R is a carboxylic acid group, a carboxylic acid ester group, preferably of an alkanol or of an optionally substituted phenol, an optionally substituted carboxylic acid amide group, or an optionally substituted carboxylic acid hydrazide group, which are very valuable intermediate products for the preparation of coloring agents, optical brighteners, textile auxiliary agents and pharmaceutical products.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: August 29, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Theodor Papenfuhs, Heinrich Volk
  • Pigment composition containing elemental carbon and process of making the same
    Patent number: 4108679
    Abstract: A composition useful as a pigment is disclosed, the composition comprised of a particulate filler material such as silica, with the individual particles being coated with elemental carbon in the form of fine particles such as those contained in carbon black. The composition is produced by a mechanical processing of a dry mixture of the particulate material and the carbon black of proportions of up to approximately 50% by weight of carbon black and 50% or more of silica of a 50 to 100 micron particle size range. The mixture is processed in a ball mill to reduce the particle size of the particulate material to an average 10 micron size, the particles at the same time being coated by deposition of the carbon black particles so as to adhere tightly to the surface thereof. An air flotation separation process sorts the resulting coated particles into various size ranges suitable for particular applications.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: August 22, 1978
    Assignee: Ebonex Corporation
    Inventors: Michael F. Szczepanik, Joseph F. Sryniawski, Adolph Busseman, Robert D. Shannon
  • Treated hydrated alumina
    Patent number: 4105465
    Abstract: This invention is concerned with hydrated alumina, that is, aluminum trihydrate, coated with a silane containing three hydrolyzable groups bonded to a silicon atom thereof and containing at least one monovalent group which contains a polyalkylene oxide moiety therein, and/or hydrolyzates of such silanes and/or condensates of such hydrolyzates. Such treated hydrated alumina are useful in reinforced plastic compositions and in coatings.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: August 8, 1978
    Assignee: Union Carbide Corporation
    Inventor: Sidney E. Berger
  • Method for reducing the viscosity and for refining kaolin clays
    Patent number: 4105466
    Abstract: A method for reducing the viscosity and for refining crude kaolin clays is disclosed. The inherent viscosities of crude kaolin clay ores, particularly those having acceptable optical and purity properties for use in preparing paper coating pigments, but normally rejected because of their high inherent viscosities, are significantly reduced by contacting an aqueous slurry of the crude clay with an inorganic polymeric complex having the general formula[Al (OH).sub.y A.sub.3-y ].sub.xwherein x = 6 to 24, y = 1.0 to 2.75 and A is selected from the group consisting of Cl.sup.-, (SO.sub.4.sup.--).sub.0.5 and NO.sub.3.sup.-. In a preferred embodiment the above treated clay is also subjected to a high shear mixing action or kneading prior to further conventional processing procedures, such as fractionation, leaching, etc.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: August 8, 1978
    Assignee: J. M. Huber Corporation
    Inventors: Albert C. Kunkle, Carl E. Kollmar, Jr.
  • Pigmentary compositions based on esters of resin acids and amino-alcohols
    Patent number: 4102704
    Abstract: A pigmentary composition combining good rheological properties and high transparency with increased coloring power which comprises an intimate mixture of (a) an organic pigment and (b) one or more unmodified or modified resin acids esterified with an amino-alcohol; the intimate mixture is obtained by incorporating in the pigment in acid aqueous solution, a solution or dispersion of the ester, and then precipitating the ester by making the aqueous solution medium alkaline or by addition of an acid to form a salt insoluble in water.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: July 25, 1978
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Pierre Louis Edmond Fournier, Jean Paul Mayer
  • Sulfur containing silane coupling agents
    Patent number: 4099981
    Abstract: Polysulfide aryl silanes, mercapto aryl silanes, the hydrolyzates and condensates thereof, a process for the manufacture of said silanes, and their use as coupling agents in vulcanized rubber compounds.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: July 11, 1978
    Assignee: Union Carbide Corporation
    Inventors: Jeffrey Yick-Pui Mui, Arthur Noah Pines