Patents by Inventor Jean Pierre Maes

Jean Pierre Maes has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7306750
    Abstract: The application of carboxylate salts for storing thermal energy is disclosed. The invention is directed to methods for the storage and use of thermal energy comprising contacting mixtures of alkali metal salts or alkali earth metal salts of carboxylic acids, storing the thermal energy in the mixture, containing the mixture in a suitable heat exchange system and using the stored thermal energy in the heat exchange system.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: December 11, 2007
    Assignee: Texaco Inc.
    Inventors: Jean-Pierre Maes, Serge Lievens, Peter Roose
  • Publication number: 20070158612
    Abstract: An aqueous heat transfer fluid comprising a C3 carboxylate freezing point depressant, either solely or in combination with C3-C5 carboxylate freezing point depressants, in combination with C6-C16 organic acid salt corrosion inhibitors, provides an antifreeze/coolant composition wherein the corrosion inhibitors exhibit uniquely enhanced solubility, especially at low temperatures, in synergistic combination with the selected carboxylate freezing point depressants.
    Type: Application
    Filed: December 22, 2006
    Publication date: July 12, 2007
    Applicant: Texaco Inc.
    Inventors: Jean-Pierre Maes, Jurgen De Kimpe, Steven Poppe
  • Patent number: 7201982
    Abstract: The invention relates to a method for cooling an electrical system comprising circulating in a cooling system of the electrical system a mixture comprising a heat transfer fluid and one or more carboxylic acid salts thereof, wherein the electrical conductivity of the mixture is less than 100 ?S/cm.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: April 10, 2007
    Assignees: Texaco, Inc., Texaco Development Corporation
    Inventors: Jean-Pierre Maes, Serge Lievens
  • Publication number: 20050139802
    Abstract: The use of an alkali metal salt or alkaline earth metal salt or of a bring solution of a C1-C16 carboxylic acid, or a mixture thereof, as a medium for the storage and use of thermal energy. The salts or solution can be used in a heat exchange fluid or a lubricant or hydraulic fluid or soap.
    Type: Application
    Filed: May 17, 2001
    Publication date: June 30, 2005
    Inventors: Jean-Pierre Maes, Serge Lievens, Peter Roose
  • Publication number: 20050051754
    Abstract: Carboxylic acids or the salts thereof are suitable for use in cooling systems where low electrical conductivity is required. The compositions are of particular use in fuel cell stacks. The preferred salts are those of amines. The salts can be used with a liquid alcohol freezing point depressant such as monoethylene glycol. Thiazoles and/or triazoles may be included, as well as other corrosion inhibitors known in the art.
    Type: Application
    Filed: October 15, 2002
    Publication date: March 10, 2005
    Inventors: Jean-Pierre Maes, Serge Lievens
  • Publication number: 20050012069
    Abstract: The use of sub-micron particles (nano-particles) and carboxylates for improving the heat-exchange characteristics of heat-transfer fluids or antifreeze coolants. The carboxylates form a stable physisorbed- or chemisorbed carboxylate protective layer on metallic nano-particles that does not hinder heat-transfer. The combination of carboxylates and metallic nano-particles provide excellent corrosion protection, improved heat-transfer and enhances the stability of the sub-micron particles (nano-particles) in suspension. Sub-micron particles (nano-particles) treated with carboxylates to form a chemisorbed carboxylate protective layer are used in a heat transfer fluid or a lubricant or hydraulic fluid or soap.
    Type: Application
    Filed: June 13, 2001
    Publication date: January 20, 2005
    Inventors: Jean-Pierre Maes, Serge Lievens, Peter Roose, Cecile Libot
  • Publication number: 20040075077
    Abstract: The present invention is directed to a method of cooling an internal combustion engine comprising circulating in the cooling system of an engine, operating at a temperature of at least 140° C., an effective amount of an engine coolant comprising a liquid alcohol freezing point depressant, a C5 to C16 carboxylic acid or salts thereof. In preferred embodiments; oxidation of liquid alcohol based freezing point depressants in high temperature applications is suppressed by use of one or more aliphatic monocarboxylic acids or the alkali metal, ammonium or amine salts thereof in combination with dicarboxylic acids or alkali metal, ammonium or amine salts thereof and triazoles and/or, optionally, imidazoles.
    Type: Application
    Filed: October 21, 2002
    Publication date: April 22, 2004
    Inventor: Jean-Pierre Maes
  • Patent number: 6689289
    Abstract: An aqueous fluid composition having a C1-C2 carboxylic acid salt and a C3-C5 carboxylic acid salt is used as a heat transfer fluid that provides improved heat transfer properties and improved corrosion protection. Such properties are desired for fluids used as an antifreeze coolant in automotive engines. The addition of a C6-C2 carboxylic acid further improves corrosion protection. The addition of hydrocarbyl triazoles or thiazoles also further improves corrosion protection. One specific embodiment of the present invention includes a solution of potassium formate, sodium propanoate, and sodium heptanoate in a weight ratio of 20:20:5, respectively, where the pH of the solution is between 8 and 9.5.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: February 10, 2004
    Assignees: Texaco Inc., Texaco Development Corporation
    Inventors: Jean-Pierre Maes, Peter Roose
  • Patent number: 6495372
    Abstract: A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid between two pH equilibrium points is measured to determine the amount of inhibitors. The refractive index can be measured to determine the amount of freezing point depressant.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: December 17, 2002
    Assignee: Texaco Inc.
    Inventors: Jean-Pierre Maes, Peter Roose, Filip Van Kenhove
  • Patent number: 6475438
    Abstract: A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid between two pH equilibrium points is measured to determine the amount of inhibitors. The refractive index can be measured to determine the amount of freezing point depressant.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: November 5, 2002
    Assignee: Texaco Inc.
    Inventors: Jean-Pierre Maes, Peter Roose, Filip Van Kenhove
  • Publication number: 20020000535
    Abstract: A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid between two pH equilibrium points is measured to determine the amount of inhibitors. The refractive index can be measured to determine the amount of freezing point depressant.
    Type: Application
    Filed: March 30, 2001
    Publication date: January 3, 2002
    Inventors: Jean-Pierre Maes, Peter Roose, Filip Van Kenhove
  • Patent number: 5366651
    Abstract: Antifreeze concentrate is disclosed having water soluble liquid alcohol freezing point depressant and corrosion inhibitor comprising carboxylic acids or their salts and a triazole compound, wherein the concentrate contains: (1) C.sub.5 -C.sub.16 aliphatic monobasic acid or the alkali metal, ammonium or amine salt thereof; (2) hydrocarbyl triazole; and (3) imidazole.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: November 22, 1994
    Assignee: Texaco Services (Europe) Ltd.
    Inventors: Jean-Pierre Maes, Walter A. van Neste
  • Patent number: 4628204
    Abstract: Method and apparatus for continuous measurement and control of the stability of colloidal systems such as heavy fuel oils, using an optical procedure with near-infrared radiation. A stream of liquid representing the colloidal system is passed through a loop or elongated conduit. In the latter, measured amounts of a flocculating agent is progressively added to the stream at a series of spaced apart stations in the loop which define separate segments. These additions progressively enhance the amount of flocculating agent to the colloidal liquid to a point where flocculation occurs. The character of each segment of the loop is tested by irradiation whereby the mixture in each segment is measured to determine in which segment flocculation has commenced. A suitable signal, whether audible or visual, can then be provided to indicate the occurrence.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: December 9, 1986
    Assignee: S.A. Texaco Belgium N.V.
    Inventor: Jean Pierre Maes
  • Patent number: 4095176
    Abstract: A method and apparatus for evaluating the corrosion protection that will be provided to a metallic surface by a surface layer. The layer is formed by use of corrosion inhibitors in a corrosive fluid.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: June 13, 1978
    Assignee: S.A Texaco Belgium n.v.
    Inventors: Jean Pierre Maes, Alan Molyneux