Patents by Inventor William I. Frey

William I. Frey 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).

  • Release molds for laminating bilayer safety glass
    Patent number: 4277299
    Abstract: A transparent safety glass laminate having an optically acceptable exposed plastic surface is fabricated by laminating an outer glass sheet and an inner preformed plastic sheet under heat and pressure with the plastic surface to be exposed supported against an optically smooth mold, preferably a second glass sheet, which is coated with an optically smooth coating of a material which acts as a release agent to facilitate separation of the plastic surface from the mold after lamination.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: July 7, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Joseph Cherenko, William I. Frey, Joseph D. Kelly, Larry S. Sokol
  • Method for developing a release surface on a glass mold
    Patent number: 4274856
    Abstract: An improved release surface for a laminating mold is disclosed wherein a glass mold surface is treated with methylchlorosilane to provide a release surface which is then polished with a polar solvent such as alcohol to remove oily residue from the release surface of the mold so that the surface of the released article is free from haze.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: June 23, 1981
    Assignee: PPG Industries, Inc.
    Inventors: William I. Frey, William R. Beestrice
  • Polyurethane laminates
    Patent number: 3971864
    Abstract: Retarding bloom in normally blooming polyurethane interlayers which are used in laminated windows, particularly motor vehicle safety glass windows in which one major surface of the polyurethane is exposed to the atmosphere, by applying a layer of wax to the exposed major surface of the polyurethane interlayer is disclosed. The resulting window is free from bloom for at least several months.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: July 27, 1976
    Assignee: PPG Industries, Inc.
    Inventors: William R. Beestrice, Joseph Cherenko, William I. Frey