Patents by Inventor Mark G. Stevens

Mark G. Stevens 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: 7897534
    Abstract: Precursor materials and methods of making are disclosed. The precursor materials include at least one of a silica source, and a carbon source, with or without liquid and a binder The methods described include pyrolyzing the precursor material to form a carbonaceous mixture and heat treating the mixture for a pre-determined time and at an elevated temperature during which carbon and/or nitrogen react with silica in the mixture to form carbides and/or nitrides. The carbides and nitrides formed from said methods may be used as blowing agents in a glass, ceramic, or metal forming processes or for promoting dispersion of the carbides and nitrides throughout a glass, ceramic, or metal composite.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: March 1, 2011
    Inventors: Giang Biscan, Hamid Hojaji, David Leslie Melmeth, Thinh Pham, Mark G. Stevens, Huagang Zhang
  • Publication number: 20090200512
    Abstract: Carbides and nitrides are provided containing a controlled amount of pre-determined diluents and methods for their manufacture and use are disclosed. The pre-determined diluents include at least one of the silica, silicon metal, carbon, alumina, boron oxide, alkaline earth oxides such as calcium oxide, magnesium oxide, alkali oxides such as sodium oxide, potassium oxide, iron oxide, titanium oxide, and other components typically present in glass, ceramics, or metals. The carbides and nitrides with pre-determined diluents are formed by optionally pyrolyzing a precursor material to form a carboneous mixture and heat treating the carboneous mixture for a pre-determined time and at an elevated temperature during which carbon and/or nitrogen reacts with silica in the mixture to form carbides and/or nitrides and controlled amounts of pre-determined diluents.
    Type: Application
    Filed: April 16, 2009
    Publication date: August 13, 2009
    Inventors: Giang BISCAN, Hamid HOJAJI, David Leslie MELMETH, Thinh PHAM, Mark G. STEVENS, Huagang ZHANG
  • Publication number: 20090156385
    Abstract: Carbides and nitrides are provided containing a controlled amount of pre-determined diluents and methods for their manufacture and use are disclosed. The pre-determined diluents include at least one of the silica, silicon metal, carbon, alumina, boron oxide, alkaline earth oxides such as calcium oxide, magnesium oxide, alkali oxides such as sodium oxide, potassium oxide, iron oxide, titanium oxide, and other components typically present in glass, ceramics, or metals. The carbides and nitrides with pre-determined diluents are formed by optionally pyrolyzing a precursor material to form a carboneous mixture and heat treating the carboneous mixture for a pre-determined time and at an elevated temperature during which carbon and/or nitrogen reacts with silica in the mixture to form carbides and/or nitrides and controlled amounts of pre-determined diluents.
    Type: Application
    Filed: October 29, 2004
    Publication date: June 18, 2009
    Inventors: Giang Biscan, Hamid Hojaji, David Leslie Melmeth, Thinh Pham, Mark G. Stevens, Huagang Zhang
  • Publication number: 20070275335
    Abstract: A bottom-up cocurrent combustion furnace for the production of synthetic microspheres by thermal expansion of glass particles is provided having improved characteristics with regard to anti-fouling, process efficiency, and yield. The disclosed furnace uses preheated combustion air to preheat the feed material and to convey the feed material in a dilute phase transport regime to a burner. The combustion air, fuel, and feed material are premixed prior to being injected though the burner. The feed material rapidly expands as it is ejected through the burner and through a flame and then rapidly cools to solidify the microspheres. Additional features are provided to prevent the furnace from fouling by keeping the feed material away from the furnace walls, removing feed material that adheres to the furnace walls, and collecting feed material that agglomerates or does not expand.
    Type: Application
    Filed: May 25, 2006
    Publication date: November 29, 2007
    Inventors: Giang Biscan, Charles D. Blake, Ronald W. Cresswell, Robert E. Everhart, Hamid Hojaji, Thinh Pham, Mark G. Stevens
  • Patent number: 7300910
    Abstract: Lubricating oil compositions providing superior soot dispersing characteristics, which contain a combination of a high molecular weight dispersant and a soot dispersant comprising a linked aromatic oligomer.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: November 27, 2007
    Assignee: Infineum International Limited
    Inventors: Antonio Gutierrez, Ricardo A. Bloch, Nancy Z. Diggs, Fredrick W. Girshick, David J. Martella, Mark G. Stevens, Jacob Emert
  • Patent number: 7119126
    Abstract: The polymer matrix material includes a polymerization product of one or more monomers selected from the group of water-soluble, ethylenically-unsaturated acids and acid derivatives, and a crosslinking agent. A quantity of water is used for polymerization, such that the polymer material is swelled to a defined volume upon curing. Optionally, a water-soluble or water-swellable polymer and/or a chemical polymerization initiator.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: October 10, 2006
    Assignee: eVionyx, Inc.
    Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
  • Patent number: 6849702
    Abstract: The polymer matrix material includes a polymerization product of one or more monomers selected from the group of water-soluble, ethylenically-unsaturated acids and acid derivatives, and a crosslinking agent. A quantity of water is used for polymerization, such that the polymer material is swelled to a defined volume upon curing. Optionally, a water-soluble or water-swellable polymer and/or a chemical polymerization initiator.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: February 1, 2005
    Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
  • Publication number: 20040266895
    Abstract: The polymer matrix material includes a polymerization product of one or more monomers selected from the group of water-soluble, ethylenically-unsaturated acids and acid derivatives, and a crosslinking agent. A quantity of water is used for polymerization, such that the polymer material is swelled to a defined volume upon curing. Optionally, a water-soluble or water-swellable polymer and/or a chemical polymerization initiator.
    Type: Application
    Filed: April 5, 2004
    Publication date: December 30, 2004
    Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
  • Publication number: 20040235688
    Abstract: The use, in a minor amount, of a detergent composition comprising one or more metal detergents which comprises metal salts of organic acids, wherein the detergent composition comprises more than 50 mole %, based on the moles of the metal salts of organic acids in the detergent composition, of:
    Type: Application
    Filed: June 22, 2004
    Publication date: November 25, 2004
    Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
  • Patent number: 6784143
    Abstract: The use, in a minor amount, of a detergent composition comprising one or more metal detergents which comprises metal salts of organic acids, wherein the detergent composition comprises more than 50 mole %, based on the moles of the metal salts of organic acids in the detergent composition, of: (I) a metal salt of an aromatic carboxylic acid, or (II) a metal salt of a phenol, or (III) both a metal salt of an aromatic carboxylic acid and a metal salt of a phenol, in a lubricating oil composition for improving the oxidation resistance of the lubricating oil composition, wherein the amount of phosphorus and sulfur in the oil composition is less than 0.09 mass % and at most 0.5 mass % respectively, based on the mass of the oil composition. It has also been found that a detergent composition comprising more than 50 mole % of a metal salt of an aromatic carboxylic acid improves the reduction in wear in an engine.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: August 31, 2004
    Assignee: Infineum International Ltd.
    Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
  • Patent number: 6750183
    Abstract: Lubricating oil compositions providing superior soot dispersing characteristics, which contain a combination of a high molecular weight dispersant and a soot dispersant comprising a linked aromatic oligomer.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: June 15, 2004
    Assignee: Infineum International Ltd.
    Inventors: Antonio Gutierrez, Ricardo A. Bloch, Nancy Z. Diggs, Fredrick W. Girschick, David J. Martella, Mark G. Stevens, Jacob Emert
  • Publication number: 20030096716
    Abstract: The use, in a minor amount, of a detergent composition comprising one or more metal detergents which comprises metal salts of organic acids, wherein the detergent composition comprises more than 50 mole %, based on the moles of the metal salts of organic acids in the detergent composition, of:
    Type: Application
    Filed: May 9, 2002
    Publication date: May 22, 2003
    Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
  • Patent number: 6495496
    Abstract: Low molecular weight Mannich base condensates of hydroxy aromatic compounds, an aldehyde; and an amine, wherein the combined number of substituent carbon atoms does not exceed 80. Such compounds are useful as soot dispersants in lubricating oils when used alone, or in combination with high molecular weight dispersants.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: December 17, 2002
    Assignee: Infineum International Ltd.
    Inventors: Antonio Gutierrez, Mark G. Stevens, Ricardo A. Bloch, Robert A. Kleist
  • Publication number: 20020115576
    Abstract: Low molecular weight Mannich base condensates of hydroxy aromatic compounds, an aldehyde; and an amine, wherein the combined number of substituent carbon atoms does not exceed 80. Such compounds are useful as soot dispersants in lubricating oils when used alone, or in combination with high molecular weight dispersants.
    Type: Application
    Filed: December 22, 2000
    Publication date: August 22, 2002
    Inventors: Antonio Gutierrez, Mark G. Stevens, Ricardo A. Bloch, Robert A. Kleist
  • Publication number: 20020115575
    Abstract: Lubricating oil compositions providing superior soot dispersing characteristics, which contain a combination of a high molecular weight dispersant and a soot dispersant comprising a linked aromatic oligomer.
    Type: Application
    Filed: December 22, 2000
    Publication date: August 22, 2002
    Inventors: Antonio Gutierrez, Ricardo A. Bloch, Nancy Z. Diggs, Fredrick W. Girschick, David J. Martella, Mark G. Stevens, Jacob Emert
  • Publication number: 20020012848
    Abstract: An electrochemical cell using a polymer matrix material includes a polymerization product of one or more monomers selected from the group of water-soluble, ethylenically-unsaturated acids and acid derivatives, and a crosslinking agent. A quantity of water is used for polymerization, such that the polymer material is swelled to a defined volume upon curing. Optionally, a water-soluble or water-swellable polymer and/or a chemical polymerization initiator.
    Type: Application
    Filed: August 30, 2001
    Publication date: January 31, 2002
    Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
  • Publication number: 20020010261
    Abstract: The polymer matrix material includes a polymerization product of one or more monomers selected from the group of water-soluble, ethylenically-unsaturated acids and acid derivatives, and a crosslinking agent. A quantity of water is used for polymerization, such that the polymer material is swelled to a defined volume upon curing. Optionally, a water-soluble or water-swellable polymer and/or a chemical polymerization initiator.
    Type: Application
    Filed: August 30, 2001
    Publication date: January 24, 2002
    Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen