Patents Examined by S. Silverberg
  • Patent number: 4110492
    Abstract: An improved method for encapsulating water-insoluble particles, particularly pigments, with dense, amorphous aluminum phosphate or fluorophosphate is disclosed. The capsules are formed in situ in an aqueous dispersion of the substrate by complexing aluminum and/or magnesium ion with phosphoric or fluorophosphoric acid, preferably in the presence of either boric acid or fluoride or complex fluoro ions. The encapsulation method comprises continuously adding separate solutions of the reactants into the dispersion over a 0.5 to 5.0 hour period, at 70.degree. to 100.degree. C., whereby a complex phosphate or fluorophosphate is deposited around the particles in the form of continuous, adherent microcapsules. The chemical, thermal and light stability of the substrate is thereby improved.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: August 29, 1978
    Assignee: The Harshaw Chemical Company
    Inventor: Clifford C. Hayman
  • Patent number: 4110493
    Abstract: A system and method of coating the seam on the inside surface of a container is disclosed. The container is initially spun about an axis generally parallel to the seam. The seam of the container is engaged while the container is rotating to stop the container with the engaging means in registry with the seam. The interior of the container is coated along the seam while the container is stopped to provide a protective coating overlying the seam. If desired, a subsequent protective coating can be applied on the entire inside surface of the container.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: August 29, 1978
    Assignee: Gerber Products Company
    Inventors: John H. Loveless, Claude T. Phillips
  • Patent number: 4105840
    Abstract: This invention relates to a polymerization reaction vessel having an approximate monolayer coating on the inner surfaces thereof which is obtained by applying thereto an aqueous coating solution containing a tannin, such as, for example, tannic acid. When polymerizing olefinic monomers, such as vinyl halides, vinylidene halides, and vinylidene monomers having at least one terminal CH.sub.2 .dbd.C< grouping, in such a coated reaction vessel, polymer buildup on the inner surfaces thereof is substantially eliminated. Multiple charges of polymer can be made in said coated vessel without opening the same between charges thus preventing the escape of unreacted monomer to the atmosphere.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: August 8, 1978
    Assignee: The B. F. Goodrich Company
    Inventor: Louis Cohen
  • Patent number: 4097353
    Abstract: A porous coating, which is effective in restricting the flow of a gas under measurement relatively to the electrode layer of the sensor and protecting the electrode against detrimental influences, is formed by spraying fine particles of a heat-resistant and chemically stable material at a high temperature onto the electrode surface to form a porous layer with pores of a moderate size, then impregnating the porous layer with an aqueous dispersion of fine particles of a similar material followed by baking the impregnated layer, so that the finished coating has pores of appropriate size and total volume.
    Type: Grant
    Filed: June 10, 1976
    Date of Patent: June 27, 1978
    Assignee: Nissan Motor Company, Limited
    Inventors: Katsuhiro Kishida, Hiroshi Takao, Kimmochi Togawa, Kazuo Matoba
  • Patent number: 4092187
    Abstract: Finely divided, crystalline high explosive compounds and compositions are ovided with a desensitizing coating of wax by mixing the explosive particles with an aqueous dispersion of the wax containing a soluble salt of a higher fatty acid dispersing agent, e.g. sodium stearate, and adding barium chloride or the like to precipitate the dispersing agent as a water-insoluble fatty acid compound and break the dispersion, thereby coating the explosive particles with an intimate mixture of the wax and the insoluble fatty acid compound.
    Type: Grant
    Filed: August 18, 1976
    Date of Patent: May 30, 1978
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Floyd J. Hildebrant, Bernard R. Banker
  • Patent number: 4090887
    Abstract: Pigmented silica microspheres having an average diameter from 2 .mu.m to 100 .mu.m and consisting essentially of from 10% to 70% by weight of particulate pigment, dispersed throughout a microporous silica matrix and, optionally, containing a coating of dense amorphous silica. The microspheres are produced by acidifying a water-in-oil emulsion. The pigmented silica micropheres are particularly useful as opacifying agents for coating compositions and as fillers for paper.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: May 23, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Mark James Marquisee, Lionel Samuel Sandell
  • Patent number: 4089989
    Abstract: A plurality of glass slides having specimens such as blood smears disposed thereon are prepared for microscopic viewing by an apparatus which automatically applies preparation solutions to the slides such as stains and buffers and thereafter automatically drys the completed slides. The staining and buffering solutions are deposited evenly over the surfaces of the slides carrying the specimens by a timed operation of one or more electro-mechanically actuated aerosol dispensers which produce fine sprays of the desired preparation solutions. Simultaneously with the generated spray, the plurality of slides are rotated at a relatively slow rate to cause a uniform distribution of the spray particles on the slide surfaces. Following the staining and buffering mode, an automatic drying mode is initiated in which the plurality of slides are rotated at a relatively higher speed for a timed interval after which the apparatus automatically turns off and the completed slides may be removed from the apparatus.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: May 16, 1978
    Inventors: Ronald D. White, John F. Gibson
  • Patent number: 4078099
    Abstract: Bleaching compositions containing coated or encapsulated bleaching agents, methods for employing these coated agents, as well as methods for preparing these encapsulates are disclosed. These compositions and methods are utilized to effectively bleach colored fabrics and textiles in both hot and cold water with minimal pinpoint damage to the fabric colors. The encapsulates have excellent storage properties and release of the active component at both hot and cold temperatures.
    Type: Grant
    Filed: August 25, 1976
    Date of Patent: March 7, 1978
    Assignee: Lever Brothers Company
    Inventor: Louis R. Mazzola
  • Patent number: 4076892
    Abstract: Particulate porous absorptive material such as carbon is coated with a biocompatible polymer to give a thin (e.g. 1-10 micron) smooth permeable coating without plugging the pores. The resulting material is free from fines and surface debris and useful for haemoperfusion. Coating is best effected by spraying hot washed carbon granules, free from fines and in rapid movement with a solution of polymer (e.g. polyHEMA) so as to bring about rapid evaporation and a coating weight preferably of up to 20% usually 0.25% to 5%.
    Type: Grant
    Filed: July 24, 1974
    Date of Patent: February 28, 1978
    Assignee: T. J. Smith & Nephew Limited
    Inventors: Jack Fennimore, Gary Ruder, Donald Simmonite
  • Patent number: 4073977
    Abstract: A method of stabilizing pyrophoric metal powders by treating the metal powders with alkylene oxides to form a polymer coating on the metal particles.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: February 14, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Koester, Gerd Wunsch, Eduard Schoenafinger, Hans H. Schneehage
  • Patent number: 4072796
    Abstract: Finely divided hydrophobic silica and silicates are prepared by precipitating of alkali silicate solutions with mineral acids or metal salt solutions and treated with organohalosilanes. To the acid precipitation suspension recovered in known manner there is added as a hydrophobizing agent an organohalosilane, preferably at about 50.degree. to 90.degree. C., the precipitated product filtered, washed and dried and there subjected to a temperature of 300.degree. to 400.degree. C. There is used as the organohalosilane a prepolycondensed organohalosilane or a mixture of prepolycondensed organohalosilanes.
    Type: Grant
    Filed: May 29, 1975
    Date of Patent: February 7, 1978
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Helmut Reinhardt, Karl Trebinger, Gottfried Kallrath
  • Patent number: 4071639
    Abstract: A removable temporary coating material for providing scratch protection particularly for nuclear components is disclosed. The coating contains a methacrylic or acrylic/methacrylic polymer in a water vehicle. Selected surfactants, lubricants and reactive solubilizing agents are also included to provide the desired lubrication and scratch resistance and to provide a coating which is readily removed so as to leave no deleterious residue. Techniques for removing and recovering the coating are also disclosed.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: January 31, 1978
    Assignee: Combustion Engineering, Inc.
    Inventors: David Nelson Palmer, Stanley Heikoff
  • Patent number: 4068024
    Abstract: A process for preparing hydrophobic finely divided particles of oxides of metals and/or oxides of silicon by chemically bonding hydrocarbon radicals to the surface of the oxide particles, said process comprising intensively mixing oxide particles having a water content less than about 1% by weight with a hydrolyzable metal or metalloid compound containing OR groups, wherein said compound is an ester of the general formula:Me(OR).sub.4wherein Me is an element from group IV of the periodic table, and each R is independently selected from C.sub.1 -C.sub.8 alkyl radicals or an aryl radical. A hydrophobic silicon dioxide particle is provided. Particles prepared by the process are useful as fillers in elastomers.
    Type: Grant
    Filed: August 12, 1974
    Date of Patent: January 10, 1978
    Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler
    Inventor: Siegmar Laufer
  • Patent number: 4068015
    Abstract: Carbon-coated microspheroids useful as fuels in nuclear reactors are produced with a low percentage of cracked coatings and are imparted increased strength and mechanical stability characteristics by annealing immediately after the carbon coating processes.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: January 10, 1978
    Assignee: The United States of America as represented by the United States Energy Research and Development Administration
    Inventors: Walter J. Lackey, Jr., John D. Sease
  • Patent number: 4065533
    Abstract: A process for the continuous production of silicon rods or tubes by the dsition of silicon from the gaseous phase on the inner wall of a carrier tube heated to the deposition temperature, in which a cooled, hollow metal cylinder is placed in a reactor having one open end, and a flexible band, substantially resistant to silicon at the deposition temperature, is continuously wound onto the cylinder in an overlapping manner at an angle of pitch from 5.degree. to 40.degree. so as to form the carrier tube for the silicon to be deposited; the tube is continuously drawn off the metal cylinder by a rotary traction movement and the portion of the tube adjacent the metal cylinder and still in the reactor is heated to the deposition temperature of about 1050.degree. to 1250.degree. C, while at the same time the gaseous mixture is passed for decomposition through the tube under a pressure exceeding the external atmospheric pressure by 0.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: December 27, 1977
    Assignee: Wacker-Chemitronic Gesellschaft fur Elektronik Grundstoffe mbH
    Inventors: Franz Koppl, Rudolf Griesshammer, Helmut Hamster
  • Patent number: 4062104
    Abstract: A disposable thermocouple probe to be used in association with an electronic processing and indicating device to comprise a clinical thermometer. The dissimilar metals of the thermocouple junction are applied by the vacuum deposition process. The optical nature of the process allows the metal thickness to be graduated to allow the dissimilar metals at the junction to be only 0.0001 to 0.1 mils thick to allow response times of less than one second, while the metal which makes sliding contact with the processing and display portion of the thermometer is graduated to a thickness of 10 times greater, for example, than the metal thickness at the junction to resist the abrasion encountered when inserted at time of use. A method is provided for the handling of the probes in large quantities by molding a structure which resembles a comb in which the individual probes are supported by a backbone.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: December 13, 1977
    Inventor: Walter Norman Carlsen
  • Patent number: 4061834
    Abstract: A durable antistatic coating is achieved on polymethylmethacrylate plastic without affecting its optical clarity by applying to the surface of the plastic a low molecular weight solvent having a high electron affinity and a high dipole moment such as acentonitrile or nitromethane alone or in the presence of photopolymerizable monomer. The treated polymethylmethacrylate plastic can then dissipate most of the induced electrostatic charge and retains its optical clarity. The antistatic behavior persists after washing, rubbing and vacuum treatment.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: December 6, 1977
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Vaclav Hadek, Robert B. Somoano, Alan Rembaum
  • Patent number: 4060653
    Abstract: A composite wire of a metal, a metal oxide or carbide of a metal, metal oxide or metal carbide powder and a mixture of a phenolic resin and a thermoplastic resin cured in a suitable shape for use in metallizing or coating a surface by flame spraying.
    Type: Grant
    Filed: September 9, 1975
    Date of Patent: November 29, 1977
    Assignee: Kennecott Copper Corporation
    Inventors: William R. O'Day, Jr., Norman D. Bensky, James D. LeBlanc
  • Patent number: 4056641
    Abstract: Fuel, fertile material or absorber material containing particles for high temperature fuel elements are coated in a fluidized bed by heating the particles and fluidizing through carrier gas preheated to the desired temperature. The coating gas, having a higher velocity than the carrier gas causing fluidizing, is blown into the fluidized particle bed from one or more nozzles from above counter to the flow of the carrier gas. The nozzles end above the fluidized layer.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: November 1, 1977
    Assignee: HOBEG Hochtemperaturreaktor-Brennelement G.m.b.H.
    Inventors: Hans Huschka, Wolfgang Warzawa
  • Patent number: 4055701
    Abstract: Azido-containing silane compositions of matter useful as coupling agents in the production of polymer composite articles.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: October 25, 1977
    Assignee: Union Carbide Corporation
    Inventors: James Glenn Marsden, Peter Joseph Orenski