Patents Represented by Attorney Maurice L. Williams
  • Patent number: 5338442
    Abstract: The invention is a process for the aqueous conversion and upgrading of organic resource materials carried out by contacting organic resource materials selected from the group consisting of coal, shale, coal liquids, shale oil, and bitumen with liquid water in the absence of externally supplied hydrogen or reducing agents, controlling the temperature in the range from above about 200.degree. C. to below the critical temperature of water to maintain water in a liquid phase, wherein the pressure is the corresponding vapor pressure (autogenous pressure) of the system, for a time sufficient to effect the conversion and upgrading process. Additionally, the contacting may be conducted in the presence of a catalyst selected from the group consisting of a brine catalyst, clay catalyst and mixtures thereof.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: August 16, 1994
    Assignee: Exxon Research & Engineering Co.
    Inventors: Michael Siskin, Alan R. Katritzky, Glen B. Brons
  • Patent number: 5188776
    Abstract: Novel ceramic filamentary micro-tubular materials are described. An entirely fluid-phase method has been devised for producing such interwoven ceramic filamentary tubular materials. The process depends for its success the ability to generate a three-dimensional random weave of ceramic tubes, with diameters in the range of about 0.01 to 2.0 microns, by forming carbon filaments by catalytic decomposition of a hydrocarbon feed, coating the filaments with a ceramic coating and then oxidizing the coated filaments to remove the carbon core leaving behind hollow ceramic micro-tubular filaments. The ceramic micro-tubular materials may be free-standing porous structures and may have a variety of uses as thermal insulators, catalyst supports, superconductor supports, filters or as reinforcements for composites.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: February 23, 1993
    Assignee: Exxon Research and Engineering Company
    Inventors: Horst Witzke, Bernard H. Kear
  • Patent number: 5094906
    Abstract: Novel ceramic filamentary micro-tubular materials are described. An entirely, fluid-phase method has been devised for producing such interwoven ceramic filamentary tubular materials. The process depends for its success the ability to generate a three-dimensional random weave of ceramic tubes, with diameters in the range of about 0.01 to 2.0 microns, by forming carbon filaments by catalytic decomposition of a hydrocarbon feed, coating the filaments with a ceramic coating and then oxidizing the coated filaments to remove the carbon core leaving behind hollow ceramic micro-tubular filaments. The ceramic micro-tubular materials may be free-standing porous structures and may have a variety of uses as thermal insulators, catalyst supports, superconductor supports, filters or as reinforcements for composites.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: March 10, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Horst Witzke, Bernard H. Kear
  • Patent number: 4970123
    Abstract: A novel isotropically reinforced microcomposite is described. An entirely fluid-phase method has been devised for producing the net-shape filamentary structures. The process depends for its success on the ability to generate in situ, within a shaped mold, a three-dimensional random weave of carbon filaments by catalytic decomposition of a hydrocarbon feed. Almost any desired filament filler matrix combination can be produced by utilizing chemical vapor deposition to modify the surface and bulk properties of the filamentary structure. Infiltration of filler matrix materials can be achieved by adaptation of existing materials technologies.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: November 13, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Horst Witzke, Bernard H. Kear
  • Patent number: 4900483
    Abstract: A novel isotropically reinforced microcomposite is described. An entirely fluid-phase method has been devised for producing the net-shape filamentary structures. The process depends for its success on the ability to generate in situ, within a shaped mold, a three-dimensional random weave of carbon filaments by catalytic decomposition of a hydrocarbon feed. Almost any desired filament filler matrix combination can be produced by utilizing chemical vapor deposition to modify the surface and bulk properties of the filamentary structure. Infiltration of filler matrix materials can be achieved by adaptation of existing materials technologies.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: February 13, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Horst Witzke, Bernard H. Kear