Patents Examined by Linda D. Skaling
  • Binary azeotropic compositions of 3-chloro-1,1,1-trifluoropropane with methanol or ethanol, or trans-1,2-dichloroethylene
    Patent number: 5034149
    Abstract: Azeotropic mixtures of 3-chloro-1,1,1-trifluoropropane (HCFC-253fb) with methanol, ethanol, or trans-1,2-dichloroethylene (t-HCC-1130) are useful in solvent cleaning applications.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: July 23, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Dental composition system and method for bleaching teeth
    Patent number: 5032178
    Abstract: A dental composition and method for bleaching vital and non-vital teeth, comprising a preselected, concentrated, aqueous solution of hydrogen peroxide and a nonaqueous component mixed to form an aqueous gel or paste, with the nonaqueous component including an inert silica gelling agent, an accelerator, a plasticizer and thickening agent, and means for establishing a substantially fixed time period for treating the teeth in response to the application of optical energy. A redox color indicator is used to transform from one color to another over the fixed time period to provide a visual indication that the treatment is completed, as well as an indication that the peroxide solution was active.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: July 16, 1991
    Assignee: Demetron Research Corporation
    Inventor: John A. Cornell
  • Binary azeotropic compositions of 1,1,1,2,3,3-hexafluoro-3-methoxypropane with one of trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, 1,1-dichloro-1,2-difluoroethane or 1,2-dichloro-1,1,-difluoroethane
    Patent number: 5026498
    Abstract: Azeotropic mixtures of 1,1,1,2,3,3-hexafluoro-3-methoxypropane with one of trans-1,2-dichloroethylene (t-HCC-1130), cis-1,2-dichloroethylene (c-HCC-1130), 1,1-dichloro-1,2-difluoroethane (HCFC-132c), or 1,2-dichloro-1,2-difluoroethane (HCFC-132), and the use of such azeotropic mixtures in solvent cleaning applications is disclosed.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Ternary azeotropic compositions of hexafluoropropylene/ethylene cyclic dimer with trans-1,2-dichloroethylene and methanol
    Patent number: 5026499
    Abstract: An azeotropic mixture of hexafluoropropylene/ethylene cyclic dimer (dimer) with trans-1,2-dichloroethylene and methanol is useful in solvent cleaning applications and as refrigerants, aerosol propellants and blowing agents.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Azeotrope-like compositions of 1,1-dichoro-1-fluoroethane; dichlorotrifluoroethane; and alkane or cycloalkane having 5 carbon atoms
    Patent number: 5026502
    Abstract: Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane; dichlorotrifluoroethane; and alkane or cycloalkane having 5 carbon atoms 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 and dry cleaning and as blowing agents.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: June 25, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Peter B. Logsdon, Ellen L. Swan, Leonard M. Stachura, Rajat S. Basu
  • Azeotropic compositions of perfluoro-1,2-dimethylcyclobutane with methanol and 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane
    Patent number: 5026497
    Abstract: Azeotropic mixtures of perfluoro-1,2-dimethylcyclobutane, methanol and either 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane, are useful in solvent cleaning applications, and as refrigerants, aerosol propellants and polymer blowing agents.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane, methanol and a mono- or di-chlorinated C.sub.2 or C.sub.3 alkane
    Patent number: 5024781
    Abstract: Stable azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane, methanol, 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: November 13, 1989
    Date of Patent: June 18, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Peter B. Logsdon, Leonard M. Stachura, Ellen L. Swan, Rajat S. Basu
  • Binary azeotropic compositions of 1,1,1,2,3,3-hexafluoro-3-methoxypropane and 2,2,3,3,3-pentafluoropropanol-1
    Patent number: 5023009
    Abstract: The azeotropic mixture of 1,1,1,2,3,3-hexafluoro-3-methoxypropane and 2,2,3,3,3-pentafluoropropanol-1, and the use of such azeotropic mixture as: a cleaning agent, a blowing agent, a refrigerant, an aerosol propellant, a heat transfer medium, a fire extinguishing agent, a gaseous dielectric and a power cycle working fluid is disclosed.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: June 11, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Oxide superconductors encased in pan-derived carbon matrix
    Patent number: 5023230
    Abstract: Disclosed is a method of preparing a superconductor wherein a precursor oxide mixture is dispersed in an appropriate polymer matrix and shaped into a predetermined form following which the matrix and oxide precursor are respectively carbonized and sintered simultaneously. An alternate method is to separately prepare a superconducting material from the precursor oxide mixture, grind the superconducting material and add it to a solution containing polyacrylonitrile, shape into a predetermined form, following which the superconducting material and matrix are, respectively, carbonized and then annealed.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: June 11, 1991
    Assignee: Hercules Incorporated
    Inventor: Huai N. Cheng
  • Binary azeotropic compositions of 1,1,1,2,3,3-hexafluoro-3-methoxypropane with methanol or isopropanol or N-propanol
    Patent number: 5023010
    Abstract: Azeotropic mixtures of 1,1,1,2,3,3-hexafluoro-3-methoxypropane with methanol or isopropanol or n-propanol, the azeotropic mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: June 11, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Oxidative hair dye composition based on a gel vehicle and a process to dye hair
    Patent number: 5021066
    Abstract: A composition for the oxidative dyeing of hair based on a gel vehicle and a dye mixture dissolved therein, wherein the gel vehicle containsA) from 12 to 16% by weight of oleic acid,B) from 12 to 30% by weight of nonyl phenol, ethoxylated with from 2 to 6 moles of ethylene oxide, and/or of fatty alcohol, having from 12 to 20 carbon atoms, ethoxylated with from 2 to 6 moles of ethylene oxide,C) from 8 to 14% by weight of fatty alcohol having from 10 to 20 carbon atoms,D) from 4 to 18% by weight of ethanol and/or isopropanol, andE) from 16 to 70% by weight of water.The new composition allows the ammonia it contains to escape more slowly, and it darkens less, when hydrogen peroxide is added, than the known gel hair dye compositions.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: June 4, 1991
    Assignee: Wella Aktiengesellschaft
    Inventors: Johann Aeby, Herbert Mager, Eugen Konrad
  • Liquid detergent composition containing a smeltite clay softening agent
    Patent number: 5017296
    Abstract: Liquid detergent compositions are disclosed for softening and washing fabrics comprising an aqueous base, a detergent active material such as a mixture of anionic and nonionic materials, a detergency builder, such as sodium tripolyphosphate, and a special fabric softening clay which swells in water but not in sodium tripolyphosphate solution. The use of such clays enable the product to be prepared without an undesirably high viscosity.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: May 21, 1991
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventor: Yvon J. Nedonchelle
  • Composite dental prosthesis element formed of filled acrylate/methacrylate polymers
    Patent number: 5009597
    Abstract: Composite dental prosthesis elements formed of filled acrylate- and/or methacrylate-based polymers and comprising a core having high flexural strength and a high bending modulus and an abrasion-resistant jacket with a highly lustrous surface are suitable for temporary and semipermanent as well as permanent installation with crowns and bridges, for inlays and the like.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: April 23, 1991
    Assignee: Kulzer & Co. GmbH
    Inventor: Roland Schaefer
  • Agent for the oxidative dyeing of hair, method for the preparation of the agent and use of the agent
    Patent number: 5006127
    Abstract: In a method for the oxidative dyeing of human or animal hair a hair dyeing agenet is prepared from at least one oxidation dye in creme or gel form, which is adjusted to a pH of 5.9 to 6.9.The preparation is performed with the addition of at least one alkali metal salt or alkaline earth metal salt as catalyst, which is added simultaneously with or immediately after the mixing of the oxidation dye with the oxidizing agent, the amount added being such that it is contained in the treatment-ready hair dyeing agent in proportions between 0.0001 and 1.00 wt.-%, preferably between 0.0004 and 0.001 wt.-%.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: April 9, 1991
    Assignee: Goldwell GmbH
    Inventors: Jurgen Tennigkeit, Herbert Lorenz
  • Trialkoxy-substituted meta-phenylenediamines, a process for their preparation, and their use as couplers for the oxidation dyeing of keratinous fibres and in particular of human hair
    Patent number: 5002585
    Abstract: Trialkoxy-substituted meta-phenylenediamines, a process for their preparation, and their use as couplers for oxidation dying of keratinous fibres and in particulate of human hair.1,3,5-trialkoxy-meta-phenylenediamine of formula: ##STR1## in which: R.sub.1 and R.sub.2 denote, independently of each other, a hydrogen atom, an alkyl radical containing 1 to 4 carbon atoms or a mono- or polyhydroxyalkyl radical containing 2 or 3 carbon atoms,Z denotes an alkyl radical containing from 1 to 4 carbon atoms, provided that, when R.sub.1 and R.sub.2 simultaneously denote a hydrogen atom, Z does not denote the methyl radical, and the addition salts of this compound with an acid.Process for the preparation of these compounds and their use as coupler in oxidation dying compositions for hair.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: March 26, 1991
    Assignee: L'Oreal
    Inventors: Alex Junino, Jean J. Vandenbossche, Herve Borowiak, Gerard Lang
  • Azeotrope-like compositions of 1,2-difluoroethane and dichlorotrifluoroethane
    Patent number: 4997589
    Abstract: Novel azeotrope-like compositions comprising 1,2-difluoroethane and dichlorotrifuoroethane which are useful in a variety of industrial applications including refrigerant applications, solvent applications, and blowing agent applications.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: March 5, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Earl E. A. Lund, Ian R. Shankland, Ellen L. Swan
  • Azeotropic compositions of perfluoro-1,2-dimethylcyclobutane with 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane
    Patent number: 4994202
    Abstract: Azeotropic mixtures of perfluoro-dimethylcyclobutane with 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane, are useful in solvent cleaning applications, and as refrigerants, aerosol propellants and polymer blowing agents.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: February 19, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • High temperature superconductor system and processes for making same
    Patent number: 4994432
    Abstract: A high temperature superconducting system has the general composition Tl-R-X-Y, wherein: R is a Group 2A element; X is a Group 1B element; and Y is a Group 6A element. Preferably, the composition has the following formula Tl-Ba-Cu-O. The high temperature superconductor of the present invention has a transition temperature of about 90 K with the probability of one phase superconducting at a temperature perhaps as high as 270 K. Processes for making the high temperature superconductor are also provided.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: February 19, 1991
    Assignee: University of Arkansas
    Inventors: Allen M. Hermann, Zhengzhi Sheng
  • Hair cosmetic composition
    Patent number: 4994088
    Abstract: Novel hair cosmetic compositions comprise 0.1 to 20 wt % of an amphoteric polymer which is soluble in an aqueous 10 wt % sodium chloride solution and insoluble in water at a concentration of 0.1 wt % at 20.degree. C., and 0.1 to 30 wt % of a water-soluble inorganic salt.The hair cosmetic compositions have good properties in terms of hair style formation and retention, and are free from objectionable feel such as stickiness. Thus, the compositions will be expected to have wide utility irrespective of the sexes and ages.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: February 19, 1991
    Assignee: Kao Corporation
    Inventors: Hiroshi Ando, Keiichi Akimoto
  • Agent for the oxidative dyeing of hair, method for the preparation of the agent and use of the agent
    Patent number: 4992077
    Abstract: In a method for the oxidative dyeing of human or animal hair a hair dyeing agent is prepared from at least one oxidation dye in creme or gel form, which is adjusted to a pH of 5.9 to 6.9.The preparation is performed with the addition of at least one metal salt as catalyst, which is added simultaneously with or immediately after the mixing of the oxidation dye with the oxidizing agent, the amount added being such that it is contained in the treatment-ready hair dyeing agent in proportions between 0.001 and 1.00 wt.-%, preferably between 0.0004 and 0.001 wt.-%.The metal salts used as catalyst are preferably selected from the group containing copper(II) chloride, copper(II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: February 12, 1991
    Assignee: Goldwell GmbH
    Inventors: Jurgen Tennigkeit, Herbert Lorenz