Patents Examined by Linda D. Skaling
  • Dental cleaner materials
    Patent number: 5120460
    Abstract: A dental cleaner material comprises as a main component an aqueous solution containing 0.1 to 2.0% by weight of ethylenediaminetetraacetic acid or at least one of its alkali metal salts. The cleaner material is gelled by the addition of a carboxyvinyl polymer, carboxymethylcellulose or sodium carboxymethylcellulose as a raiser in viscosity showing thixotropy, further contains 0.01 to 0.3% by weight fo a p-hydroxybenzoic acid ester as an antibacterial agent, and is regulated to pH of 7.0.+-.0.5.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: June 9, 1992
    Assignees: G-C Dental Industrial Corp., Yasuhiro Asai
    Inventors: Yasuhiro Asai, Kiyoko Nakamura, Masayuki Takahashi
  • Dichloropentafluoropropanes and acetone compositions
    Patent number: 5120462
    Abstract: Azeotropic and azeotrope-like compositions composed of dichloropentafluoropropanes and acetone are described which are suitable for use in cleaning processes and in printing and copying processes for fixing toner based on polystyrene.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: June 9, 1992
    Assignee: Kali-Chemie AG
    Inventors: Hans Buchwald, Andreas Brackmann, Boleslaus Raszkowski
  • Azeotrope-like compositions of dichloropentafluoropropane and a hydrocarbon containing six carbon atoms
    Patent number: 5118438
    Abstract: Stable azeotrope-like compositions consisting essentially of dichloropentafluoropropane and a hydrocarbon containing six carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: June 2, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Hillel Magid, David P. Wilson, Dennis M. Lavery, Richard M. Hollister, Richard E. Eibeck, Michael Vanderpuy
  • Azeotrope-like compositions of dichloropentafluoropropane, ethanol and a hydrocarbon containing six carbon atoms
    Patent number: 5118437
    Abstract: Novel azeotrope-like compositions comprising dichloropentafluoropropane, ethanol and a hydrocarbon containing six carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: June 2, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Hillel Magid, David P. Wilson, Dennis M. Lavery, Richard M. Hollister
  • Ternary azeotropic compositions of dichloropentafluoropropane and trans-1,2-dichloroethylene with methanol or ethanol or isopropanol
    Patent number: 5116525
    Abstract: Azeotropic mixtures of dichloropentafluoropropane (HCFC-225) and trans-1,2-dichloroethylene (T-HCC-1130) with methanol or ethanol or isopropanol, are useful in solvent cleaning applications as refrigerants, aerosol propellants and polymer blowing agents.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: May 26, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Azeotrope-like compositions of dichloropentafluoropropane and 1,2-dichloroethylene
    Patent number: 5116526
    Abstract: Azeotrope-like compositions comprising dichloropentafluoropropane and 1,2-dichloroethylene are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: May 26, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Hillel Magid, Richard E. Eibeck, Michael Van Der Puy, Richard M. Hollister, Dennis M. Lavery, David P. Wilson
  • Aliphatic alpha, omega-diamine compounds and their use in hair dyeing
    Patent number: 5114429
    Abstract: The invention relates to the new compounds consisting of N,N'-bis(.beta.-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-1,3-diamino-2-propa nol and N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'-methylphenyl)ethylenediamine, and their use in keratinous fiber dyeing compositions and processes.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: May 19, 1992
    Assignee: L'oreal
    Inventors: Alex Junino, Alain Genet, Gerard Lang
  • Precipitated silicas and process for their production and use
    Patent number: 5110574
    Abstract: Process for the production of cleansing, polishing and thickening silica for use in toothpastes, which is characterized in that using the conventional precipitation processes, silica suspensions are obtained of various particles sizes and particle densities and are mixed thoroughly together until the mixture is homogenous in the suspension phase and the resulting suspension mixture is treated in the conventional manner by filtering, drying and comminuting.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: May 5, 1992
    Assignee: Degussa Aktiengesellschaft
    Inventors: Helmut Reinhardt, Adam Becker, Robert Kuhlmann, Peter Nauroth
  • Azeotropes of 2-methylbutane and 1,1-dichloro-1-fluorethane and the use thereof in the production of rigid foams
    Patent number: 5106527
    Abstract: The present invention is directed to a novel azeotrope consisting essentially of from 25 to 35% by weight of 2-methylbutane and from 65 to 75% by weight of 1,1-dichloro-1-fluoroethane, and the use thereof in the production of rigid, closed cell foams.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: April 21, 1992
    Assignee: Mobay Corporation
    Inventors: Herman P. Doerge, Keith G. Spitler, Charles E. Mortimer
  • Azeotrope-like compositions of dichloropentafluoropropane, 2-propanol and a hydrocarbon containing six carbon atoms
    Patent number: 5104565
    Abstract: Novel azeotrope-like compositions comprising dichloropentafluoropropane, 2-propanol and a hydrocarbon containing six carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: April 14, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Hillel Magid, David P. Wilson, Richard M. Hollister, Dennis M. Lavery
  • Cleaning composition based on 1,1,1,2,2-pentafluoro-3,3-dichloropropane and methyl tert-butyl ether
    Patent number: 5102563
    Abstract: For replacing cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention provides a composition comprising 55 to 80% by weight of 1,1,1,2,2-pentalfuoro-3,3-dichloropropane (225ca) and 20 to 45% by weight of methyl tert-butyl ether.These two compounds form a negative azeotrope (b.p.=59.9.degree. C. at atmospheric pressure).The composition, which may be stabilized, can be used for cleaning solid surfaces, in particular for removing flux from printed circuits and for degreasing mechanical parts.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: April 7, 1992
    Assignee: Societe ATOCHEM
    Inventors: Daniel Desbiendras, Jean-Jacques Martin, Pascal Michaud
  • Binary azeotropic compositions of polyfluoropentanes and methanol
    Patent number: 5100572
    Abstract: An azeotropic mixture of polyfluoropentanes and methanol is disclosed. The azeotropic mixture is useful as: a cleaning agent, a blowing agent, a refrigerant, an aerosol propellant, a heat transfer medium and a power cycle working fluid.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: March 31, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Ternary azeotropic compositions of 1,1,1,2,3,3-hexafluoro-3-methoxypropane and cis-1,2-dichloroethylene with methanol or ethanol or isopropanol or n-propanol
    Patent number: 5098595
    Abstract: Azeotropic mixtures of 1,1,1,2,3,3-hexafluoro-3-methoxypropane with cis 1,2-dichloroethylene (c-CFC-1130) and methanol or ethanol or isopropanol or n-propanol, the azeotropic mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: March 24, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Superconductive substance Y.sub.0.294 Ba.sub.0.336 Cu.sub.01.77
    Patent number: 5098885
    Abstract: The disclosed substance has a composition of Y.sub.x Ba.sub.y CuO.sub.z, wherein x=0.2-0.5 y=0.2-0.5 and z.perspectiveto.1+y+(3/2)x, with a face-centered tetragonal crystalline structure of perovskite type. When being cooled at 85-135 K, the structure of the substance starts to transform and its electric resistance disappears at a temperature higher than 47 K so that the substance becomes superconductive.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: March 24, 1992
    Assignee: The University of Tokyo
    Inventor: Shinobu Hikami
  • Coloration of dental restorations
    Patent number: 5094619
    Abstract: A method of coloring dental restorations which consists of incorporating within the dental restoration material prior to curing a coloration agent which upon the application of heat or other energy alters the color of the restoration. By applying the energy in steps it is possible to match closely the color of the restoration to adjacent teeth or that of the tooth on which the restoration is mounted.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: March 10, 1992
    Inventor: Gerald G. McLaughlin
  • Azeotrope-like compositions of tertiary butyl 2,2,2-trifluoroethyl ether and perfluoromethylcyclohexane
    Patent number: 5091104
    Abstract: Azeotrope-like compositions of tertiary butyl 2,2,2-trifluoroethyl ether and perfluoromethylcyclohexane which are useful in a variety of industrial cleaning applications including defluxing of printed circuit boards.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: February 25, 1992
    Assignee: Allied-Signal Inc.
    Inventor: Michael Van Der Puy
  • Thixotropic aqueous liquid automatic dishwashing detergent composition
    Patent number: 5089161
    Abstract: Thixotropic aqueous liquid automatic dishwashing detergent composition with improved anti-filming properties and method of using the detergent composition. The detergent composition comprises inorganic builder salts, chlorine bleach, bleach-stable detergent and a thixotropic thickener and optionally alumina or titanium dioxide. The compositions provide reduced filming on dishware, glassware, china and the like, particularly in hard water, and remain stable against phase separation.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: February 18, 1992
    Assignee: Colgate-Palmolive Co.
    Inventors: Fahim U. Ahmed, Charles E. Buck
  • Novel azeotropic or azeotrope-like mixture of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and ethanol, and its use
    Patent number: 5087383
    Abstract: The invention relates to a novel azeotropic or azeotrope-like mixture which essentially comprises about 90-97% by mass of 2,2,2-trifluoroethyl 1,1,2,2-tetrafluoroethyl ether and about 3-10% by mass of ethanol and also to a process for cleaning electrical or electronic components, in particular soldered circuit boards or printed circuits, but also other solid surfaces, with the aid of said mixture. Soldering fluxes, in particular, can be removed from circuit boards with the aid of said mixture.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: February 11, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Horst Robeck, Hans-Matthias Deger
  • Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, a monochlorinated C3 alkane and optionally an alkanol
    Patent number: 5085797
    Abstract: Stable azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, a mono-chlorinated C.sub.3 alkane and optionally an alkanol which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: February 4, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Ellen L. Swan, Rajat S. Basu
  • Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane, ethanol and a mono- or di-chlorinated C2 or C3 alkane
    Patent number: 5085796
    Abstract: Stable azeotrope-like compositions comprising 1,1-dichloro-1-fluorethane, dichlorotrifluoroethane, ethanol, and a mono- or di-chlorinated C.sub.2 or C.sub.3 alkane which are useful in a variety of industrial cleaning applications.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: February 4, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Leonard M. Stachura, Peter B. Logsdon, Ellen L. Swan, Rajat S. Basu