Patents by Inventor Ernest E. Lawson

Ernest E. Lawson 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).

  • Composition and method of producing insoluble mag-oxy cements
    Patent number: 4312674
    Abstract: Mag-oxy cements are made by either molding or heat treating after molding at elevated temperatures. The products are made utilizing colloidal silica and/or phosphates and the products are made by either molding or by heat treating after molding at elevated temperatures.The products treated at 250.degree. F. show considerably less solubility particularly where both phosphates and silicates are present in which case the weight loss based on the reactables may be as low as approximately 2 percent. When heat treated at 300.degree. F., there is no weight loss in practically all cases; but a pickup in weight occurs indicating an additional hydration. Sheet molding compounds are also made by processes which provide a deficiency of water of hydration.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: January 26, 1982
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Joseph P. Stalego, Ernest E. Lawson
  • Apparatus for producing sheet resinous materials
    Patent number: 4238176
    Abstract: A method of making molding compounds, and particularly sheet molding compounds, wherein the reactive monomers are mixed directly with high density inorganic fillers and other ingredients of a molding compound. The monomers are converted to a resin insitu that is in or approaching the B-stage, so that the material is handleable as a solid and is moldable. Because of the amount, type, and thermal conductivity of the fillers, the resinification can be done quickly in a continuous process, by reason of the fact that the monomers are spread over a large surface area of inert fillers to provide good heat transfer, and exceedingly good process control.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: December 9, 1980
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Walter D. Cottrell, Jr., Ernest E. Lawson
  • Method of making molding compounds and products produced thereby
    Patent number: 4182701
    Abstract: A method of making molding compounds, and particularly sheet molding compounds, wherein the reactive monomers are mixed directly with high density inorganic fillers and other ingredients of a molding compound. The monomers are converted to a resin insitu that is in or approaching the B-stage, so that the material is handleable as a solid and is moldable. Because of the amount, type, and thermal conductivity of the fillers, the resinification can be done quickly in a continuous process, by reason of the fact that the monomers are spread over a large surface area of inert fillers to provide good heat transfer, and exceedingly good process control.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: January 8, 1980
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Walter D. Cottrell, Jr., Ernest E. Lawson