Patents by Inventor Carol A. Wetter

Carol A. Wetter 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).

  • Plastic sheets with improved wear resistance and methods of production
    Publication number: 20020143089
    Abstract: The present invention provides plastic sheets having a superior abrasion resistance to the sheets marketed as solid surface, by the inclusion therein of 1 phr to 70 ph of tabular alumina particles.
    Type: Application
    Filed: January 23, 2001
    Publication date: October 3, 2002
    Inventors: Ettore Minghetti, Harry Cheesman, John Eitel, Carol Wetter
  • Acrylic sheet having uniform distribution of coloring and mineral filler before and after thermoforming
    Patent number: 5747154
    Abstract: Ranges of chain-transfer agents, thixotropic agents, and alumina trihydrate content are balanced to minimize migration or maldistribution of coloring matter and alumina trihydrate during curing of methyl methacrylate in a syrup including polymethylmethacrylate and also during subsequent heating and deformation in thermoforming, to achieve constancy of impact resistance and improve stability of patterns even in deformed portions of formed sheets.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: May 5, 1998
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel, Carol A. Wetter
  • Thermoformable acrylic sheet having uniform distribution of color and mineral filler
    Patent number: 5705552
    Abstract: A composition suitable for making thermoformable sheets and the like. The composition comprises a crosslinked poly (methyl methacrylate) typically having uncrosslinked poly (methyl methacrylate) dispersed therein. The composition a comprises 0.5 to about 1.0 pph of at least one crosslinking agent x, and up to about 0.58x-0.28 pph of a at least one chain terminator. The composition also comprises about 0.1 to 8 pph poly (methyl methacrylate) compatible plasticizer, and has about 20 to 60 wt % solid particle dispersed therein.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: January 6, 1998
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel, Carol A. Wetter
  • Acrylic sheet having uniform distribution of coloring and mineral filler before and after thermoforming
    Patent number: 5567745
    Abstract: Ranges of chain-transfer agents, thixotropic agents, and alumina trihydrate content are balanced to minimize migration or maldistribution of coloring matter and alumina trihydrate during curing of methyl methacrylate in a syrup including polymethylmethacrylate and also during subsequent heating and deformation in thermoforming, to achieve constancy of impact resistance and improve stability of patterns even in deformed portions of formed sheets.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: October 22, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel, Carol A. Wetter
  • Acrylic sheet having uniform distribution of coloring and mineral filler before and after thermoforming
    Patent number: 5521243
    Abstract: Ranges of chain-transfer agents, thixotropic agents, and alumina trihydrate content are balanced to minimize migration or maldistribution of coloring matter and alumina trihydrate during curing of methyl methacrylate in a syrup including polymethylmethacrylate and also during subsequent heating and deformation in thermoforming, to achieve constancy of impact resistance and improve stability of patterns even in deformed portions of formed sheets.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: May 28, 1996
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel, Carol A. Wetter