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).
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Patent number: 7897534Abstract: 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: GrantFiled: April 16, 2009Date of Patent: March 1, 2011Inventors: Giang Biscan, Hamid Hojaji, David Leslie Melmeth, Thinh Pham, Mark G. Stevens, Huagang Zhang
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Publication number: 20090200512Abstract: 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: ApplicationFiled: April 16, 2009Publication date: August 13, 2009Inventors: Giang BISCAN, Hamid HOJAJI, David Leslie MELMETH, Thinh PHAM, Mark G. STEVENS, Huagang ZHANG
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Publication number: 20090156385Abstract: 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: ApplicationFiled: October 29, 2004Publication date: June 18, 2009Inventors: Giang Biscan, Hamid Hojaji, David Leslie Melmeth, Thinh Pham, Mark G. Stevens, Huagang Zhang
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Publication number: 20070275335Abstract: 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: ApplicationFiled: May 25, 2006Publication date: November 29, 2007Inventors: Giang Biscan, Charles D. Blake, Ronald W. Cresswell, Robert E. Everhart, Hamid Hojaji, Thinh Pham, Mark G. Stevens
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Patent number: 7300910Abstract: 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: GrantFiled: April 26, 2004Date of Patent: November 27, 2007Assignee: Infineum International LimitedInventors: Antonio Gutierrez, Ricardo A. Bloch, Nancy Z. Diggs, Fredrick W. Girshick, David J. Martella, Mark G. Stevens, Jacob Emert
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Patent number: 7119126Abstract: 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: GrantFiled: April 5, 2004Date of Patent: October 10, 2006Assignee: eVionyx, Inc.Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
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Patent number: 6849702Abstract: 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: GrantFiled: August 30, 2001Date of Patent: February 1, 2005Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
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Publication number: 20040266895Abstract: 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: ApplicationFiled: April 5, 2004Publication date: December 30, 2004Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
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Publication number: 20040235688Abstract: 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: ApplicationFiled: June 22, 2004Publication date: November 25, 2004Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
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Patent number: 6784143Abstract: 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: GrantFiled: May 9, 2002Date of Patent: August 31, 2004Assignee: Infineum International Ltd.Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
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Patent number: 6750183Abstract: 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: GrantFiled: December 22, 2000Date of Patent: June 15, 2004Assignee: Infineum International Ltd.Inventors: Antonio Gutierrez, Ricardo A. Bloch, Nancy Z. Diggs, Fredrick W. Girschick, David J. Martella, Mark G. Stevens, Jacob Emert
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Publication number: 20030096716Abstract: 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: ApplicationFiled: May 9, 2002Publication date: May 22, 2003Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
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Patent number: 6495496Abstract: 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: GrantFiled: December 22, 2000Date of Patent: December 17, 2002Assignee: Infineum International Ltd.Inventors: Antonio Gutierrez, Mark G. Stevens, Ricardo A. Bloch, Robert A. Kleist
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Publication number: 20020115576Abstract: 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: ApplicationFiled: December 22, 2000Publication date: August 22, 2002Inventors: Antonio Gutierrez, Mark G. Stevens, Ricardo A. Bloch, Robert A. Kleist
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Publication number: 20020115575Abstract: 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: ApplicationFiled: December 22, 2000Publication date: August 22, 2002Inventors: Antonio Gutierrez, Ricardo A. Bloch, Nancy Z. Diggs, Fredrick W. Girschick, David J. Martella, Mark G. Stevens, Jacob Emert
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Publication number: 20020012848Abstract: 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: ApplicationFiled: August 30, 2001Publication date: January 31, 2002Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen
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Publication number: 20020010261Abstract: 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: ApplicationFiled: August 30, 2001Publication date: January 24, 2002Inventors: Robert W. Callahan, Mark G. Stevens, Muguo Chen