Patents Examined by Christine A. Skane
  • Patent number: 5814595
    Abstract: The invention provides azeotrope-like compositions consisting essentially of R.sub.f OC.sub.2 H.sub.5, where R.sub.f is a branched or straight chain perfluoroalkyl group having 4 carbon atoms, and an organic solvent selected from the group consisting of: straight chain, branched chain and cyclic alkanes having 6 to 8 carbon atoms; esters having 4 carbon atoms; ketones having 4 carbon atoms; disiloxanes having 6 carbon atoms; cyclic and acyclic ethers having 4 to 6 carbon atoms; chlorinated alkanes having 3 to 4 carbon atoms and chlorinated alkenes having 2 carbon atoms. The compositions are useful for cleaning, as solvents or carriers for coating and as heat transfer materials.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: September 29, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard M. Flynn, Dean S. Milbrath, John G. Owens, Daniel R. Vitcak, Hideto Yanome
  • Patent number: 5800731
    Abstract: Homogeneous, electro-viscous fluids are provided which contain aluminum soaps based on products obtained by reacting one or more mono- or polycarboxylic acid(s) or the anhydrides or semi-esters thereof with reactive aluminum compounds, such as aluminum alcoholates. The aforesaid fluids manifest high electro-rheological effect and are completely homogeneous, and do not require a dispersant.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: September 1, 1998
    Assignee: RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    Inventors: Dietrich Pirck, Hans-Dieter Grasshoff, Harald Kohnz, Peter Finmans, Tobias Carstensen, Dieter Jakubik, Wilfried Weber, Dieter Winkler
  • Patent number: 5792381
    Abstract: A nonazeotropic working fluid medium for use in a thermodynamic cycle system, comprising a mixture of compounds and characterized in that one or more vaporization loss/replenishment cycles of each less than about 15% of the total weight of the medium and cumulative up to about 50% of the total weight of the medium result in a total decrease in the coefficient of performance of said medium of no more than about 5%, or a loss in electric power generating efficiency of not more than about 3 percent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 11, 1998
    Inventor: Chujun Gu
  • Patent number: 5792382
    Abstract: A nonazeotropic working fluid medium for use in a thermodynamic cycle system, comprising a mixture of compounds and characterized in that one or more vaporization loss/replenishment cycles of each less than about 15% of the total weight of the medium and cumulative up to about 50% of the total weight of the medium result in a total decrease in the coefficient of performance of said medium of no more than about 5%, or a loss in electric power generating efficiency of not more than about 3 percent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 11, 1998
    Inventor: Chujun Gu
  • Patent number: 5788877
    Abstract: Substantially constant boiling mixtures of difluoromethane and 1,1,1-trifluoroethane or perfluoroethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, and expansion agents for polymers.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: August 4, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Mark Brandon Shiflett
  • Patent number: 5783104
    Abstract: A refrigerant/absorbent composition is disclosed which comprises an aqueous solution of at least one absorbent salt, present in an amount sufficient to provide utility of said composition as an absorbent, and at least one germanium compound, present in an amount sufficient to inhibit corrosion. Also, a method of inhibiting corrosion by adding a germanium compound to a refrigerant/absorbent composition is disclosed. Further, an absorption heat transferring machine having a working fluid which comprises an absorber salt, a germanium compound and water is disclosed.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: July 21, 1998
    Assignee: Gas Research Institute
    Inventor: Stephen Anthony Kujak
  • Patent number: 5778685
    Abstract: An improved thermal energy storage system and a process for thermal energy storage and transfer are disclosed. The cooling medium, a clathrate forming mixture, comprises water, and a hydrofluorocarbon having at least three carbon atoms and a molecular diameter less than about 7 .ANG.. Preferably the hydrofluorocarbon is selected from hydrofluoropropanes and more preferably is selected from the group consisting of CHF.sub.2 CHFCHF.sub.2, CF.sub.2 HCF.sub.2 CH.sub.2 F, CF.sub.3 CHFCH.sub.2 F, CF.sub.3 CH.sub.2 CF.sub.2 H, CF.sub.3 CF.sub.2 CH.sub.3, CF.sub.3 CHFCF.sub.2 H, CF.sub.3 CH.sub.2 CF.sub.3, CF.sub.3 CF.sub.2 CF.sub.2 H, CH.sub.2 FCF.sub.2 CF.sub.3, CHF.sub.2 CF.sub.2 CH.sub.3, CF.sub.3 CF.sub.2 CF.sub.2 CH.sub.3, CF.sub.3 CF.sub.2 CF.sub.2 CF.sub.2 H, and CF.sub.3 CFHCFHCF.sub.3.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: July 14, 1998
    Assignee: Allied Signal Inc
    Inventors: Rajiv R. Singh, Raymond H. P. Thomas, D. P. Wilson, R. Robinson
  • Patent number: 5773782
    Abstract: A dielectric fluid for the machining of metal by spark erosion which contains saturated aliphatic hydrocarbons with a proportion of aromatic hydrocarbons which is lower than one percent in weight and to which an additive is added, wherein organic substances from the group of anthraquinone derivatives are added as the additive in a concentration of maximally one percent in weight.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: June 30, 1998
    Assignee: Oel-Held GmbH
    Inventors: Manfred Storr, Wilhelm Rehbein
  • Patent number: 5772911
    Abstract: Compositions include compositions of 1,1,2,2,3,3,4,4-octafluorobutane and a hydrocarbon having from 3 to 7 carbon atoms. Specific examples include 1,1,2,2,3,3,4,4-octafluorobutane and butane, cyclopropane, isobutane, propane, cyclopentane, 2,2-dimethylbutane, n-pentane, 2-methylbutane, cyclohexane, 2,3-dimethylpentane, 3-ethylpentane, heptane, hexane or methylcyclopentane. Also included in this invention are compositions of 1,1,2,2,3,3,4,4-octafluorobutane and ethyl formate, propylene oxide, bis(pentafluoroethyl)sulfide, dimethoxyethane or tetrahydrofuran. These compositions, which may be azeotropic or azeotrope-like, may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: June 30, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Barbara Haviland Minor, Allen Capron Sievert
  • Patent number: 5766504
    Abstract: In order to depress a crystallization temperature of an absorbent composition for an absorption refrigeration system without depressing vapor absorption ability, cesium chloride is added to an alkaline solution containing lithium bromide as a main component, in an amount of 0.01 to 15% by weight, based on the weight of an aqueous 64% lithium bromide solution.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: June 16, 1998
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Kawasaki Thermal Engineering Co., Ltd.
    Inventors: Takatoshi Shoji, Yoshiaki Takatani, Akihiro Murakami, Kunihiko Nakajima
  • Patent number: 5766517
    Abstract: The present invention comprises a mixture of hydrocarbons having a well-defined chemical composition that is suitable for use as a dielectric coolant in electrical equipment in general, and specifically in transformers. The dielectric coolants of the present invention are particularly suited for use in sealed, non-vented transformers, and have improved performance characteristics, including decreased degradation of the paper insulating layers, as well as a greater degree of safety and environmental acceptability. The present dielectric coolants comprise relatively pure blends of compounds selected from the group consisting of aromatic hydrocarbons, polyalphaolefins, polyol esters, and natural vegetable oils, along with additives to improve pour point, increase stability and reduce oxidation rate.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: June 16, 1998
    Assignee: Cooper Industries, Inc.
    Inventors: Gary L. Goedde, Gary A. Gauger, John Lapp, Alan Paul Yerges
  • Patent number: 5766506
    Abstract: A heat transfer fluid is disclosed which comprises a glycol, a phosphate, and a copolymer additive which is a copolymer of an ethylenically substituted carboxylic acid and an aldehyde. A method for preparing the heat transfer fluid comprises admixing 92 to 96 weight percent of one or more glycols; 2 to 4 weight percent of a phosphate; and 0.01 to 0.25 weight percent of the copolymer additive. Precipitation of phosphate salts is inhibited in phosphate-containing glycol-based fluids by the addition of the copolymer additive before mixing the fluid with water.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: June 16, 1998
    Assignee: The Dow Chemical Company
    Inventors: Abel Mendoza, Mark E. Ogle
  • Patent number: 5759976
    Abstract: Tableted detergents are formed from a hydrated phosphate sequestrant, caustic, free water and, optionally, fillers by combining the products and tableting the components without permitting the tablets or detergent to exceed 50.degree. C. In a preferred embodiment where fillers are incorporated, all free water is combined with the phosphate sequestrants, both anhydrous and hydrated. After the water has been absorbed by the sequestrants, the filler and caustic can be added and the detergent tableted. The free water is bound sufficiently tightly to the phosphate sequestrant that it does not rapidly react with the anhydrous caustic, maintaining the temperature at less than 50.degree. C., which in turn prevents the water of hydration in the phosphates from reacting and thereby weakening the formed tablets. The tablets can also be formed by combining the filler with the phosphate sequestrants and water and subsequently adding caustic if the detergent is cooled and its temperature maintained below 50.degree. C.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: June 2, 1998
    Assignee: Diversey Lever, Inc.
    Inventors: Kenneth James Roach, Patricia Anderson
  • Patent number: 5755990
    Abstract: Sequestrant compositions comprising combinations of an alkali metal or ammonium borate with an adduct formed by reaction of an .alpha., .beta. unsaturated polycarboxylic acid with a mono- or dicarboxylated sugar, in which the adduct has at least two hydroxy groups in a vicinal configuration. The sequestrants can be used to complex alkaline earth and transition metal ions and are especially useful for complexing calcium and magnesium in aqueous laundry solutions. They also are effective for soil dispersion and for inhibiting the deposition of soil on fabric.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: May 26, 1998
    Assignee: U.S. Borax Inc.
    Inventors: Vincent Lamberti, Alice P. Hudson
  • Patent number: 5750048
    Abstract: An electroviscous fluid comprising an electrically insulating liquid and solid electrolyte particles dispersed therein.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: May 12, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Koji Shima, Eiji Hattori, Yasuo Oguri
  • Patent number: 5747442
    Abstract: The present invention relates to pretreater or compositions in stick form which remove stains. The compositions contain 30 to 80 wt. % of a nonionic surfactant, 1 to about 20 wt. % of an anionic soap, and 0.1% to 10 wt. % of a hydrophobically modified polar polymer. A method of using the composition is also described.
    Type: Grant
    Filed: January 25, 1996
    Date of Patent: May 5, 1998
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Barbara Helen Bory, Walter Joseph Lunsmann, Dennis Stephen Murphy, Tamara Padron, Lucia Victoria Salas
  • Patent number: 5746934
    Abstract: A homogeneous electro rheological fluid is provided. The fluid comprises a lyotropic liquid crystalline polymer dissolved in a solvent in low concentrations in a manner in which the fluid does not exhibit a liquid crystalline state. According to the homogeneous electro rheological fluid of the present invention, the problem associated with the precipitation of particles can be circumvented. Moreover, the electro rheological fluid can provide a large difference in torque before and after the application of an electric field; therefore, exhibits good electro rheological properties.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: May 5, 1998
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Makoto Sasaki, Takafumi Ishii, Katsuhiko Haji
  • Patent number: 5747435
    Abstract: Composition useful as 2-in-1 cleansing products are disclosed that are extremely mild to skin and hair, which use neutralized, essentially chargeless, ionic complexes of fatty amines and fatty acids to deliver various levels of conditioning; neutralized, essentially chargeless, ionic complexes of a detersive surfactant comprising a water soluble cationic surfactant and/or polymer complexed with one or more anionic surfactants; or an amphoteric surfactant complexed with one or more anionic surfactants; or a water soluble cationic surfactant and/or polymer complexed with one or more amphoteric surfactants; or a water soluble cationic surfactant and/or polymer complexed with one or more anionic surfactants and an amphoteric surfactant; detersive surfactant-soluble but water-insoluble silicones or derivatives thereof; and water. These products exhibit true 2-in- conditioning properties, and are lower in cost than current 2 in 1 products. Clear or opacified products can be formulated.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: May 5, 1998
    Assignee: Colgate-Palmolive Company
    Inventor: Amrit M. Patel
  • Patent number: 5744052
    Abstract: Refrigerant compositions are disclosed which are non-flammable when vapor charged and which perform as well as compositions of 50 weight percent difluoromethane and 50 weight percent pentafluoroethane.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: April 28, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Donald Bernard Bivens
  • Patent number: 5741769
    Abstract: A liquid duty liquid microemulsion composition comprises a mixture of a secondary alkane sulfonate surfactant, an alkyl ether polyethenoxy sulfate surfactant, an anionic biodegradable surfactant, a cosurfactant, a perfume or water insoluble hydrocarbon and water.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: April 21, 1998
    Assignee: Colgate Palmolive Company
    Inventor: Rita Erilli