Patents Examined by Dale Lovercheck
  • Patent number: 4043875
    Abstract: An improved technique employing first and second flash vaporization stages for purifying radioactive liquids is described. The liquid is first flash-evaporated in the first vaporization stage and the resulting vapor is conducted to a first direct condenser. Enriched liquid obtained from the second vaporization stage is applied via a circulating pump to the first direct condenser to condense by contact the vapor from the first vaporization stage and to form a mixture with this condensate. The resulting mixture is thus flash-evaporated in the second vaporization stage. A portion of the enriched liquid obtained from the second vaporization stage is withdrawn from the loop formed by said second vaporization stage, said circulating pump, said first direct condenser, and the connecting conduits therebetween for further processing, e.g., recycling to the first vaporization stage, or for discharging.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: August 23, 1977
    Assignee: Vereinigte Delstahlwerke AG. (VEW)
    Inventors: Gundolf E. Rajakovics, Heinz Gabernig, Guenter Peter Klein
  • Patent number: 4013414
    Abstract: A novel class of soluble organic nitrogen compounds which produces various colors when dissolved in organic liquid solvents. These dyes produce a color from blue to red if the organic liquid medium has a neutral or basic pH which reversibly changes to yellow if the liquid medium has an acid pH. The color variation can also serve as an indication of solvent polarity.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: March 22, 1977
    Assignee: General Electric Company
    Inventors: Francois A. Lavallee, Donald G. LeGrand, George L. Gaines, Jr.
  • Patent number: 4012195
    Abstract: Corrosion inhibiting compositions are described which contain a hydrazine compound and an organometallic complex. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more ortho aromatic ligands containing at least two hydroxy or two amino functional groups or at least one amino and one hydroxy group. The use of these compositions as oxygen scavengers in corrosive environments is also described.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: March 15, 1977
    Assignee: Olin Corporation
    Inventor: Manfred G. Noack
  • Patent number: 4012289
    Abstract: A mixture of n-butane and acetone is effectively separated by liquid-liquid extraction or extractive distillation using a sulfolane as the extractive solvent.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: March 15, 1977
    Assignee: Phillips Petroleum Company
    Inventor: Donald M. Haskell
  • Patent number: 4004983
    Abstract: The heating walls for a battery of coke oven chambers are formed by rows of twin heating flues. Each heating flue includes a crosswall having an internal passageway with exit ports at graduated elevation to form a header flue. The header flues in two adjacent heating walls are connected by a first series of ducts to regenerators that supply preheated air during the heating half-cycle. A second series of ducts extend between other regenerators and exit ports on the sole of the heating flues for conducting preheated lean gas or, optionally, preheated air when heating with rich gas. The ducts of each series alternate from heating wall to heating wall so that the sequence of upgoing and downgoing flues alternates from heating wall to heating wall.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: January 25, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Erich Pries
  • Patent number: 4003708
    Abstract: An automatic photometric analyzer is disclosed using an automatic exchanger holding a sample solution. A recorder, a photometer, an injector for the sample solution, and supply systems for pure water and coloring solutions are used. Additionally, valves under control of an automatic controller properly control the flow and the solution to provide a simple and practical apparatus with rapid automatic operation for analysis. The injector delivers reactant solutions to a reactor from which reactant is circulated through the photometric means to measure the absorbency thereof and back to the reactor.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: January 18, 1977
    Assignees: Nippon Steel Corporation, Kokusai Electric Co., Ltd.
    Inventors: Isamu Taguchi, Akihiro Ono, Ryutaro Matsumoto
  • Patent number: 4002489
    Abstract: A method of pickling metallic material particularly for the continuous treatment of material in strip or wire form and especially such material consisting of stainless steel, wherein the material after annealing is subjected in a first step to the chemical attack of a first aqueous solution which is heated to a temperature above room temperature, preferably to between - C, and which contains HF in contents of from 7 to 25%, or which contains HF in the contents mentioned above and H.sub.2 SO.sub.4 over 2%, or which contains HF in the contents mentioned above the NaCl up to 10%, but especially from 0.5 to 2.5%; or which contains HF in the contents mentioned above and H.sub.2 SO.sub.4 in the contents mentioned above and NaCl in the contents mentioned above, and in a second step the material is subjected to the chemical attack of a second aqueous solution heated to a temperature above room temperature, preferably to between - C, and containing HF and HNO.sub.3.
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: January 11, 1977
    Assignee: Nyby Bruk AB
    Inventors: Tore Hedqvist, Einar Gunnarsson, Benny Flodin
  • Patent number: 3996113
    Abstract: An extractive distillation cosolvent comprising furfural-alicyclic or acyclic C.sub.5 -C.sub.8 ketone having a boiling point of C., for example cyclohexanone, gives 20% or more improved hydrocarbon solubility and provides a more efficient process for separation of C.sub.4 and C.sub.5 hydrocarbons of varying degrees of saturation.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: December 7, 1976
    Assignee: Petro-Tex Chemical Corporation
    Inventor: Val G. Henneberg
  • Patent number: 3994686
    Abstract: Apparatus for the sterilization of a tube of packages which employs a stationary source of ultra-violet rays inside the tube of material which has a cross-sectional shape substantially the same as that of the tube.
    Type: Grant
    Filed: March 11, 1975
    Date of Patent: November 30, 1976
    Assignee: AB Ziristor
    Inventors: Jan Axel Ingemar Rauser, Irma Marita Rauser
  • Patent number: 3993547
    Abstract: Disclosed is a process for the distillation of readily polymerizable vinyl aromatic compounds and a new polymerization inhibitor therefor. The process comprises subjecting a vinyl aromatic compound to distillation conditions in a distillation system and adding to the system the new polymerization inhibitor comprising alpha, gamma-bis-diphenylene-beta-phenyl allyl.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: November 23, 1976
    Assignee: Cosden Technology, Inc.
    Inventor: James M. Watson
  • Patent number: 3993443
    Abstract: A liquid body of volatile inorganic chemical which reacts with water and evolves acidic vapor, such as liquid sulfur trioxide, is treated to suppress the evolution of said noxious vapors therefrom to the atmosphere by applying to the exposed surface of said liquid body a treating agent comprising glass microbubbles having on the surfaces thereof an adherent film resulting from the application to said surfaces of a fluoroaliphatic radical-containing material selected from the group consisting of fluorosilane or poly(fluorosiloxane).
    Type: Grant
    Filed: June 25, 1974
    Date of Patent: November 23, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard A. Guenthner
  • Patent number: 3993444
    Abstract: A device having an open top container holding a quantity of a volatile paste like material within the interior of the container, which material is intermittently dispensed in vapor form to the ambient atmosphere. An electric circuit controlled motor is intermittently energized at predetermined time intervals to rotate a fan in the device for specific time periods to direct currents of air onto the exposed surface of the paste and transform the paste into vapor that is discharged outwardly from the container.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: November 23, 1976
    Inventor: Edward Leslie Brown
  • Patent number: 3992149
    Abstract: A method suitable for the rapid colorimetric testing of raw water supplies, domestic sewage or industrial wastes for determining the residual presence and concentration of either anionic or cationic surfactants. An appropriate dye will react with ionic surfactant and form a chloroform-soluble, colored complex in the presence of chloroform. The color intensity of the vigorously rocked and subsequently settled chloroform layer is proportional to the concentration of the "dye-ionic surfactant complex", and can then be measured by making spectrophotometric readings of the chloroform solution at the optimum wavelength of the instrument used.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: November 16, 1976
    Assignee: Calspan Corporation
    Inventor: Lawrence K. Wang
  • Patent number: 3992148
    Abstract: Apparatus for preparing sterilized particulate solid materials, comprising a sterilizing vessel mounted on hollow trunnions for rotation about a generally horizontal axis and shaped so as to provide a tumbling action on the solid material therein as it rotates, a fluid inlet leading via one of the hollow trunnions, a discharge valve at a point remote from the axis of rotation leading into a solids discharge duct passing out via one of the hollow trunnions, and a supply line for cleaning and sterilizing fluids passing via one of the hollow trunnions, whereby the discharge duct may be cleaned and sterilized in preparation for discharge while the vessel is rotating.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: November 16, 1976
    Assignee: The A.P.V. Company Limited
    Inventors: David Teignmouth Shore, Hugh Eddowes
  • Patent number: 3992147
    Abstract: The present invention is concerned with a method for sterilizing psyllium seed husk without substantial swelling of the psyllium seed husk comprising contacting for 5 minutes or more said psyllium seed husk with a C solution of 0.2-10% by weight hydrogen peroxide in a solvent having 2-50 parts by volume water and 50-98 parts by volume isopropanol.
    Type: Grant
    Filed: November 14, 1975
    Date of Patent: November 16, 1976
    Assignee: G. D. Searle & Co.
    Inventors: John W. Christian, Jerry J. Renbarger
  • Patent number: 3990848
    Abstract: A system, which induces air flow past a gel type product and into the environment, comprises a cartridge that includes a porous container for holding the product and a battery mounted with the container. The cartridge is formed to be received in an air flow inducing device that includes a housing having an air admitting opening and an air discharging opening. A fan is mounted in the housing to induct air flow through the air admitting opening, through the container, past the product and out of the air discharging opening into the environment. The fan is driven by a motor that is connected to two contacts mounted in the housing and positioned to make contact with the terminals of the battery when the cartridge is received in the air flow inducing device.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: November 9, 1976
    Assignee: The Risdon Manufacturing Company
    Inventor: Charles James Corris
  • Patent number: 3991171
    Abstract: Aluminium fluoride hydrates, especially aluminium fluoride trihydrate, are dehydrated by a process involving dehydration in two sections, the first dehydration being effected in a disc dryer while observing certain process conditions and the second dehydration being effected in a fluidized bed at a temperature up to C.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: November 9, 1976
    Assignee: Chemie Linz Aktiengesellschaft
    Inventors: Franz Haidinger, Helmuth Fingrhut, Franz Jenatschek, Arankathu Skaria
  • Patent number: 3988112
    Abstract: Annular concentric jets of steam and a liquid to be sterilized, respectively, are contacted with each other in a jet nozzle; and the resulting annular jet of steam-heated liquid is swept along both its inside and its outside by two additional annular jets of cold liquid concentric to the first-mentioned jets, thereby preventing material from the liquid to be sterilized from burning onto surfaces of the jet nozzle.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: October 26, 1976
    Assignee: Alfa-Laval AB
    Inventors: Bjorn-Olow Johansson, Bengt Arne Palm
  • Patent number: 3985627
    Abstract: A device for magnetic lifting and removal of the feed opening cover of a coking chamber oven from the charging region of said oven comprises a magnet carried by a gripping unit and operatively connected with a crank drive for rotating said cover back and forth in said gripping unit, said magnet further being operatively connected with a displaceable slide means through the intermediary of a guide rail for guiding the movement of the slide means, the rail having horizontal and vertical branches, actuation of a drive means for said slide means first causes lifting of said cover and then lateral displacement of said slide means with said cover.
    Type: Grant
    Filed: April 12, 1974
    Date of Patent: October 12, 1976
    Assignee: Klockner-Humboldt-Deutz Aktiengesellschaft
    Inventors: Gunter Gebhardt, Josef Peters
  • Patent number: 3983362
    Abstract: A combination comprising a push button switch or other switching means disposed in a cover of a contact lens disinfecting apparatus whereby the switching means can actuate the heating means included in the apparatus only when the cover of the apparatus is in a completely closed position.
    Type: Grant
    Filed: July 18, 1975
    Date of Patent: September 28, 1976
    Assignee: Bausch & Lomb Incorporated
    Inventors: Paul A. Hoogesteger, John Kadlecik