Patents Examined by J. Poer
  • Calcium aluminate cement compositions and mixes and method for preparing them
    Patent number: 4033782
    Abstract: Compositions and mixes of calcium aluminate cement with or without aggregates and with controlled amounts of calcium formate and preparation of the same, which significantly accelerate the setting times and early compressive strength gain of the product formed after addition of water for hydraulic setting of the cement.By careful control of composition and particularly of amount of calcium formate included, new calcium aluminate cement compositions and mixes are provided, useful for patching, topping and other uses where fast setting, and high early strength characteristics are required.
    Type: Grant
    Filed: March 23, 1976
    Date of Patent: July 5, 1977
    Assignee: Martin Marietta Corporation
    Inventors: James Allen Ray, Thomas Joseph Lazio
  • Low porosity aggregate-containing cement composition and process for producing same
    Patent number: 4032353
    Abstract: Disclosed herein are low porosity aggregate-containing cement compositions comprising hydraulic cement containing substantially no calcium sulfate at least 0.1% alkali bicarbonate by weight based on dry ground cement, and at least 0.1% of a lignosulfonate or sulfonated lignin by weight based on dry ground cement, said aggregate-containing cement composition having been made at a water-to-cement ratio of between 0.4 and 0.15. Also, disclosed are methods for producing these low porosity aggregate-containing cements.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 28, 1977
    Assignee: Westvaco Corporation
    Inventors: Frank J. Ball, David V. Braddon, Lynden J. Stryker
  • Binder composition
    Patent number: 4032352
    Abstract: A binder composition for agglomerating directly reduced metallized particles and mineral ore particles comprises pitch, hydrated lime, sodium silicate and water. An agglomerated product is also disclosed.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: June 28, 1977
    Assignee: Midrex Corporation
    Inventor: Wolfgang B. Pietsch
  • Binder for alumina containing refractories
    Patent number: 4030936
    Abstract: A refractory composition is disclosed herein comprising an alumina-containing refractory mix and a phosphoric acid type binder. The binder contains sodium sulfate and aluminum sulfate in addition to phosphoric acid or its precursor such as phosphorous pentoxide.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: June 21, 1977
    Inventor: Melvin M. Willis
  • Cement composition
    Patent number: 4030939
    Abstract: A cement composition consisting of the product of a mixture of spray-dried hydrated silicate powder, a silica polymer-forming agent and water. The resulting inorganic silica polymer cement is capable of withstanding sustained exposure to high temperatures without loss of desirable mechanical properties and has a high degree of adhesive as well as compressive strength together with rapid room temperature curing characteristics. A siliceous filler may be added. In addition, a fluoride or halide fixation agent may be added so that the resulting cement product may resist higher temperatures.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: June 21, 1977
    Assignee: Southwest Research Institute
    Inventor: William A. Mallow
  • Porous refractory shapes
    Patent number: 4028122
    Abstract: Porous refractory shapes having sufficient strength for use as thermal insulation in metal melting furnaces at insulation service temperatures of 3,400.degree. to 3,900.degree. F are formed in place by bonding refractory particles of alumina, for instance, with aluminum hydroxide generated by the reaction of aluminum with water in the presence of a corrosion accelerator, and either with or without a reaction control agent satisfactory for eliminating or significantly suppressing the evolution of hydrogen, nitrogen dioxide, hydrogen chloride, or the like from the reacting mass or for reducing the rate of reaction corrosion.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: June 7, 1977
    Inventor: Herbert Greenewald, Jr.
  • Process for manufacturing rapid hardening portland cement clinker
    Patent number: 4028126
    Abstract: A process for manufacturing a rapid hardening portland cement clinker containing a calcium halo-aluminate having the formula; 11CaO.7Al.sub.2 O.sub.3.CaX.sub.2, in which X is a halogen, characterized by adding at least one sulfur compound selected from calcium sulfate, calcium sulfite and calcium sulfide to the mixed raw materials comprising mainly an aluminous material, a calcareous material, a silicious material, an iron source and a halogen source, and burning the obtained mixture in an oxidizing temperature.
    Type: Grant
    Filed: January 7, 1974
    Date of Patent: June 7, 1977
    Assignee: Onoda Cement Company, Ltd.
    Inventors: Shigejiro Mori, Hiroshi Uchikawa, Shunichiro Uchida
  • Cement composition
    Patent number: 4028125
    Abstract: A cement composition is provided containing portland cement; calcium sulfate hemihydrate; an alkali metal nitrate; one or more retarders selected from the group consisting of a low molecular weight hydroxypolycarboxylic acid and sodium, potassium, and lithium salts thereof, and an alkaline hexametaphosphate; and as optional ingredients, calcium chloride and/or a condensation product of mononaphthalene sulfonic acid and formaldehyde; said ingredients being present in amounts effective to provide a cement which will set within a desired period of time at temperatures below about 80.degree. F down to below freezing, e.g. 32.degree. F, to provide a monolithic mass having adequate strength.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: June 7, 1977
    Assignee: The Dow Chemical Company
    Inventor: Robert C. Martin
  • Compacted refractory shapes
    Patent number: 4028123
    Abstract: Compacted refractory shapes having sufficient densities for lining metal melting furnaces and use at service temperatures of 3,400.degree. to 3,900.degree. F to retain molten metal are formed in place by bonding refractory particles of alumina, for instance, with aluminum hydroxide generated by the reaction of aluminum with water in the presence of a corrosion accelerator, and either with or without a reaction control agent satisfactory for eliminating or significantly suppressing the evolution of hydrogen, nitrogen dioxide, hydrogen chloride, or the like from the reacting mass or for reducing the rate of reaction corrosion.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: June 7, 1977
    Inventor: Herbert Greenewald, Jr.
  • Method of enhancing the refractoriness of high purity fused silica
    Patent number: 4028124
    Abstract: A method is disclosed wherein high purity fused silica is produced from a liquid flowable form of a silica slurry or sol and the refractoriness of the fused silica is enhanced by homogeneously doping the silica with a selected metal oxide in conjunction with elemental silicon.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: June 7, 1977
    Assignee: Corning Glass Works
    Inventors: Peter P. Bihuniak, Donald L. Guile
  • Economical, finely controlled cement production
    Patent number: 4026717
    Abstract: Method and apparatus for manufacturing portland cement characterized by a plurality of steps. First, there is introduced into the feed end of a rotary kiln at a first rate a first mixture containing calcareous material for the cement; and at a second rate a second mixture including at least one of argillaceous material and siliceous material for the cement. Either or both mixtures may be coarsely ground. Next, there is introduced into the combustion zone of the kiln at a third rate a third mixture and a fuel, the third rate of the third mixture being complementary with the second rate of the second mixture and the first rate of the first mixture so as to form a balanced cement clinker for the cement, the cement clinker being discharged from the discharge end of the kiln for further processing into the desired final form of the cement.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: May 31, 1977
    Assignee: Texas Industries, Inc.
    Inventors: Philip H. Harris, Virgil L. Sewell, James. L. Stevens
  • Process for the preparation of starting mixture for making construction elements
    Patent number: 4025355
    Abstract: The invention relates to a process for the preparation of a concentrate or starting mixture containing pigments, blowing agents or mixtures thereof, for making construction elements, which need uniform distribution wherein an aqueous suspension of a pigment and/or blowing agent containing a surfactant is combined with a plurality of ferromagnetic bodies in a rotating electromagnetic field to cause stirring of the suspension.The resultant starting concentrate mixture may then be successfully used in making colored silica brick, various colored concretes, as well as for preparing cellular concrete which is widely used in civil engineering and industrial building by adding the proper amount of the concentrate to the raw materials for the concrete or bricks.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: May 24, 1977
    Inventors: Vasily Pavlovich Mozhaev, Ilya Yakovlevich Leichenko, Oleg Yakovlevich Gerasimov, Semen Grigorievich Lyandres, Jury Borisovich Zuev, Boris Alexandrovich Evdokimov, July Alexandrovich Matveev
  • Oxychlorination of hydrocarbons in the presence of non-halide copper containing catalysts
    Patent number: 4025461
    Abstract: Copperchloride has been employed as a reagent for oxychlorination of hydrocarbons. It has now been found that a non-halide copper compound in combination with a rare earth compound is an excellent oxychlorination catalyst, e.g. a CuCO.sub.3 -- CeO.sub.2 catalyst calcined at 900.degree. C. for 1 hour converted 99 mole % of ethylene fed at a selectivity of 100% to chlorinated products, principally vinyl chloride, ethyl chloride and dichloroethane.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: May 24, 1977
    Assignee: Petro-Tex Chemical Corporation
    Inventors: Louis J. Croce, Laimonis Bajars, Maigonis Gabliks
  • Portland cement-making and municipal refuse conversion
    Patent number: 4022630
    Abstract: The invention provides a method of incinerating municipal refuse by burning it in a pulverized condition in a rotary kiln with added basic mineral matter, especially Portland cement raw materials, at a temperature sufficient to burn off all combustibles. A stony aggregate is obtained, which in a preferred embodiment is clinker, the rotary kiln being part of a cement plant. Conventional fuel may also be used for firing along with the refuse.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: May 10, 1977
    Assignee: The Associated Portland Cement Manufacturers Limited
    Inventors: David Watson, Peter Hood
  • Refractories using boric acid and water soluble alcohol binder
    Patent number: 4021254
    Abstract: Refractory materials such as magnesia and mixtures of magnesia and chromite are formed into refractory compositions or unburnt brick utilizing a binder containing a mixture of boric acid and a water-soluble polyhydric alcohol.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: May 3, 1977
    Inventors: Gunther L. Mortl, Johann Lederer
  • Concrete structure and method of preparing same
    Patent number: 4021258
    Abstract: A concrete structure containing in its body short fibers and at least one piece of cloth in an intertwined state is produced by disposing at least one piece of cloth in a form, pouring into said form a cement slurry composed of water, short fibers and a material selected from the group consisting of the hydraulic and air setting substances, allowing the cement slurry to set, and thereafter removing the form.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: May 3, 1977
    Assignee: Teijin Limited
    Inventor: Shinobu Uogaeshi
  • Cementious composition for use in preparing pointing compounds or mortar compounds
    Patent number: 4021257
    Abstract: A cementious composition is provided which comprises 25 to 100% Portland cement and from 0.001 to 0.25% of certain long-chain organic polymers having a Flocculation Index of less than 0.5. A dry-set grout composition may be prepared using the composition or a sag-resistant dry-set mortar compound may be prepared using the composition.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: May 3, 1977
    Assignee: Tile Council of America, Inc.
    Inventor: Frank E. Bernett
  • Gypsum composition
    Patent number: 4021259
    Abstract: A gypsum composition obtained by molding and drying an aqueous slurry comprising calcined gypsum, polyvinyl alcohol, and at least one metal compound. The composition has high surface hardness and high water resistance.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: May 3, 1977
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Koei Komatsu, Kunihiro Harada, Seiji Aotani, Akio Itabashi
  • Gypsum set accelerator
    Patent number: 4019920
    Abstract: A gypsum set accelerator, produced by compression milling a mixture of ground gypsum rock and starch, and the addition thereof to an aqueous slurry of settable calcined gypsum such as in the forming of paper-covered gypsum wallboard.
    Type: Grant
    Filed: May 23, 1975
    Date of Patent: April 26, 1977
    Assignee: National Gypsum Company
    Inventors: Edward A. Burkard, Donald A. Kossuth
  • Air entraining agents
    Patent number: 4019916
    Abstract: It is known to mix cement, mortar and the like in the presence of an air entraining agent. According to the invention a water soluble sulphosuccinamate is employed as the air entraining agent. A particularly preferred air entraining composition is provided comprising a water soluble sulphosuccinamate, a water soluble sulphosuccinate and a water soluble alkyl benzene sulphonate.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: April 26, 1977
    Assignee: Albright & Wilson Limited
    Inventors: David Stainsley Golightly, Allan Onions