Patents by Inventor Jerry W. Cox

Jerry W. Cox 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).

  • Tool for forming a beveled edge on cement work
    Patent number: 5269675
    Abstract: A cement finishing tool for forming a beveled edge around the top of a cylindrical pedestal. The soft cement is disposed in an open top cylindrical form. The tool is then moved around the border of the cement body adjacent the form so that a curved lip, engaging the inside surface of the form, removes a strip of cement having a triangular shaped cross-section.In another form of the invention, the tool has an elongated straight lip for forming a straight beveled edge in a cement body.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: December 14, 1993
    Inventor: Jerry W. Cox
  • Reclamation of spent glycol by treatment with alkali metal hydroxide and distillation
    Patent number: 4225394
    Abstract: Ethylene glycol is recovered from spent glycol containing impurities, such as dimethyl terephthalate, by subjecting the spent glycol to a sequential flash evaporation-distillation or distillation-flash evaporation-distillation procedure. Dimethyl terephthalate impurities are rendered non-volatile by the addition of a small amount of alkali metal hydroxide prior to flash evaporation. Dewatering of spent glycol and separation of ethylene glycol from impurities rendered non-volatile by alkali metal hydroxide is also performed in one or two distillation steps. Sufficient ethylene glycol is recovered to make use of flash evaporation an optional step.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: September 30, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Jerry W. Cox, Mulkey C. Wilkes