Patents Examined by Christine Skane
  • Patent number: 6258292
    Abstract: An alternative refrigerant to chlorofluorocarbons and their substitutes such as R-12 and R-134a and for R-22, and demonstrating improved performance as a refrigerant than those substituted for while having the properties of being nontoxic, non-corrosive, nonflammable and safer to the environment including a blend of one or more of fluorocarbons known in the industry as R-1216 and R-22.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: July 10, 2001
    Inventor: Donald E. Turner
  • Patent number: 6254798
    Abstract: This invention relates to compositions that include nitrous oxide and at least one of trifluoromethane, difluoromethane, tetrafluoroethane, pentafluoroethane, perfluoroethane or ethane. These compositions are useful as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, aerosol propellants, heat transfer media, electronic gases, plasma etchants, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company.
    Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Clifford Keith Rice, James Richard Sand
  • Patent number: 6183663
    Abstract: A leak detection dye delivery system for introducing a leak detection dye into a climate control system is described. The leak detection dye delivery system includes a canister loaded with a leak detection dye composition including dye concentrate, a lubricant, and a refrigerant.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: February 6, 2001
    Assignee: Bright Solutions, Inc.
    Inventors: Terrence D. Kalley, Richard C. Cavestri
  • Patent number: 6183660
    Abstract: The invention provides a refrigerant comprising a mixture of three compounds selected from the group consisting of hydrofluorocarbons represented by the formula ClHmFn  (1) wherein when l is 1, m is an integer of 1 or 2, n is an integer of 2 or 3 and m+n=4; when l is 2, m is an integer of 1 to 4, n is an integer of 2 to 5 and m+m=6; and when l is 3, m is an integer of 1 to 3, n is an integer of 5 to 7 and m+n=8.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: February 6, 2001
    Assignee: Daikin Industries, Ltd.
    Inventors: Yukio Omure, Masahiro Noguchi, Katsuki Fujiwara
  • Patent number: 6183662
    Abstract: A two-step process comprising as a first step draining a refrigerant heat transfer fluid made of molecules containing at least one chlorine atom per molecule and mineral oil lubricant dissolved therein from an unflushable compressor and associated piping in a vehicle air conditioner, thereby leaving a mineral oil residue. The second step comprises replacing the refrigerant heat transfer fluid in all parts of the vehicle air conditioner designed to contain such fluid with a replacement heat transfer fluid. The replacement fluid consists essentially of 1,1,1,2-tetrafluorethane and a composition of matter suitable for serving as the lubricant or lubricant base stock. The composition of matter is capable of forming a soluble clear solution with a mineral oil residue in a weight ratio of mineral oil to composition of at least 25:100 and forming a single phase with 1,1,1,2-tetrafluoroethane between −55° C. and +71° C.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: February 6, 2001
    Assignee: Henkel Corporation
    Inventor: Nicholas E. Schnur
  • Patent number: 6159889
    Abstract: There is provided a catalyst comprising: (A) a titanium metal compound represented by the formula: (C.sub.5 R.sup.1.sub.5)TiX.sub.2 Y; (B) a compound having the formula: R.sup.2 H, wherein R.sup.2 is an alkoxy, thiolato, carboxyl, or amino group; (C) an aluminoxane, and optionally a support or spray drying material (D). There is also provided a polymerization process employing the catalyst, a polymer produced using the catalyst, and a cable produced therefrom.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: December 12, 2000
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Eric Paul Wasserman
  • Patent number: 6159917
    Abstract: The invention provides dry cleaning compositions comprising hydrofluoroether, a cosolvent selected from the group consisting of glycol ethers, fluorocarbon surfactants, alkanols, and mixtures thereof, and water present in an amount of less than 1 percent by weight. In another aspect, the invention provides a method of cleaning fabric articles comprising the step of contacting an effective amount of the above dry cleaning composition with a fabric for a length of time sufficient to clean the article.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: December 12, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Jimmie R. Baran, Jr., John C. Newland
  • Patent number: 6159396
    Abstract: An electrorheological magnetic fluid including an electrically insulating liquid and fine particles dispersed therein is described, wherein the fine particles include a fine magnetic particle as a core, wherein the fine magnetic particle has a surface which is covered by an electroconductive substance, and the fine magnetic particle with its surface covered by the electroconductive substance is completely coated with a surfactant. A process for producing the electrorheological magnetic fluid is also described.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: December 12, 2000
    Assignees: Toyohisa Fujita, Nittetsu Mining Co., Ltd., Hitachi Powdered Metal Co., Ltd.
    Inventors: Toyohisa Fujita, Kenji Yoshino
  • Patent number: 6156228
    Abstract: The present invention relates to fire-resistant hydraulic fluids. More particularly, the invention relates to fire-resistant hydraulic fluid compositions comprising the combination of a trialkoxyalkyl-phosphate, a diluent selected from the group consisting of a natural triglyceride, a synthetic ester, and a polypropylene glycol, and a high molecular weight polymer.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: December 5, 2000
    Assignee: Houghton International, Inc.
    Inventors: Rosauro V. Holgado, Richard Adams, Chan Talaty
  • Patent number: 6156224
    Abstract: A mixed working fluid having almost no influence on stratosphere ozone layer and capable of being a substitute for R22, comprising 15 to 90% by weight perfluorodimethylether and one or two selected from fluorinated dimethylethers consisting of exclusively two carbon atoms, one oxygen atom, hydrogen atoms and fluorine atoms, said fluorodimethylether being selected from the group consisting of 85% by weight or less pentafluorodimethylether, 50% by weight of less dimethylether, 60% by weight or less trifluorodimethylether, 60% by weight of less tetrafluorodimethylether, and 50% by weight or less difluorodimethylether.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: December 5, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Yoshida, Masami Funakura, Kazuo Nakatani, Minoru Tagashira
  • Patent number: 6156225
    Abstract: This invention relates to compositions that include nitrous oxide and at least one of trifluoromethane, difluoromethane, tetrafluoroethane, pentafluoroethane, perfluoroethane or ethane. These compositions are useful as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, aerosol propellants, heat transfer media, electronic gases, plasma etchants, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: December 5, 2000
    Assignee: E. I du Pont de Nemours and Company.
    Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Clifford Keith Rice, James Richard Sand
  • Patent number: 6153118
    Abstract: A refrigerator oil for use in compressors using therein a hydrogen-containing halogenocarbon as a refrigerant, consisting essentially of as a base oil at least two esters selected from the group consisting of a specific pentaerythritol ester such as an ester of pentaerythritol with a mono- or dicarboxylic acid, a specific polyol ester such as an ester of trimethylolethane with a mono- or dicarboxylic acid, a specific ester such as an ester of ethylene glycol and a dicarboxylic acid, and a specific polyol ester synthesized from a neopentyl type polyhydric alcohol, a monocarboxylic acid and a dicarboxylic acid; and further comprising at least one kind of an epoxy compound.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: November 28, 2000
    Assignee: Nippon Mitsubishi Oil Corp.
    Inventors: Hiroshi Hasegawa, Noboru Ishida, Umekichi Sasaki, Tatsuyuki Ishikawa
  • Patent number: 6153117
    Abstract: An azeotropic refrigerant of sulfur hexafluoride and one or more of octafluoropropane or decafluorobutane is described, as well as its method of use.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: November 28, 2000
    Assignee: Cooperative "Elegaz"
    Inventors: Igor Michaylovich Mazurin, Anatoli Yakovlevich Stolyarevski, Alexander Sergeevich Doronin, Alexander Vasilievich Shevtsov
  • Patent number: 6143243
    Abstract: This invention relates to a method of inhibiting the cavitation-erosion corrosion of aluminum surfaces. The method comprises the step of contacting the aluminum surface with a formulation comprising a corrosion inhibitor composition comprising one or more carboxylic acids, or salts or isomers thereof, and a polymerizable-acid graft polymer which comprises an unsaturated grafting acid and an alkylene oxide polymer, or copolymers thereof. This method has been demonstrated to be a surprisingly effective means to inhibit cavitation-erosion corrosion of aluminum surfaces found in the cooling systems of internal combustion engines.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: November 7, 2000
    Assignee: Prestone Products Corporation
    Inventors: Aleksei V. Gershun, Peter M. Woyciesjes
  • Patent number: 6133221
    Abstract: A cleaning process suitable for both mild and aggressive applications employs non-flammable, non-corrosive and environmentally friendly, fluorinated hydrobromocarbon solvent based cleaning compositions.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: October 17, 2000
    Assignee: Albemarle Corporation
    Inventors: Phillip R. Beaver, James E. Boone, Dixie E. Goins, Eric W. Liimatta, David L. Shelton, Ronald L. Shubkin
  • Patent number: 6132636
    Abstract: Refrigerant compositions containing oxazolyl-coumarin dyes for leak detection under ultraviolet light, and methods for the use of such dyes in leak detection.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: October 17, 2000
    Inventors: Rajiv R. Singh, Robert J. Schiller, Jr., Harold J. Kieta
  • Patent number: 6126851
    Abstract: A glycol-based antifreeze/coolant concentrate to be blended in coolant in a cooling system of a vehicle is disclosed, which can effectively inhibit occurrence of cavitation damage in the cooling system while suppressing production of nitrosoamine which is a known carcinogenic substance. A glycol-based antifreeze/coolant concentrate of the present invention contains a 0.05-8.0 wt. % p-toluate and a 0.01-1.0 wt. % molybdate.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: October 3, 2000
    Assignee: CCI Co., Ltd.
    Inventors: Yuji Miyake, Yasuaki Mori
  • Patent number: 6126852
    Abstract: A linear monobasic aliphatic carboxylic acid is used with low levels of molybdate and a hydrocarbyl triazole to produce a well balanced corrosion inhibiting formulation with very low solids to minimize potential deposits and exhibit surprising long life characteristics in engine coolant applications.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: October 3, 2000
    Assignee: Ashland Inc.
    Inventors: David E. Turcotte, Arnold L. Coffey, Jr., Alden W. Olsen, Michael A. Dituro, Carl R. Stephens
  • Patent number: 6123868
    Abstract: A heat exchange medium is disclosed which utilizes a change in molecular configuration of photochromic compounds when they are exposed to light. Further, by the addition of the photochromic compound as a side chain to an organic polymer, the polymer can also be induced to change configuration and absorb larger amounts of heat.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: September 26, 2000
    Inventors: Bruce Sangster, James D. Bond
  • Patent number: RE37101
    Abstract: A fluid composition suitable for use as an aircraft hydraulic fluid is disclosed. The fluid composition comprises a fire resistant phosphate ester base stock comprising between about 10% and about 100% by weight of a trialkyl phosphate, between about 0% and about 70% by weight of a dialkyl aryl phosphate, and from about 0% to about 25% by weight of an alkyl diaryl phosphate, with the proviso that the sum of the proportionate amount of each base stock component must equal 100%. The alkyl substituents of the trialkyl phosphate, the dialkyl aryl phosphate, and the alkyl diaryl phosphate contain between 3 and 8 carbon atoms, preferably between 4 and 8 carbon atoms, more preferably between 4 and 5 carbon atoms, and are bonded to the phosphate moiety via a primary carbon. It is still further preferred that the alkyl substituents of the trialkyl phosphate, the dialkyl aryl phosphate, and the alkyl diaryl phosphate are isoalkyl groups.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: March 20, 2001
    Assignee: Solutia Inc.
    Inventor: Gerbrand Deetman