Patents by Inventor Peggy S. Schipper

Peggy S. Schipper 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).

  • Vinyl chloride polymer/acrylic polymer capstocks
    Publication number: 20030008959
    Abstract: A composition, particularly suited for forming a surface layer (capstock) with excellent weathering properties of a composite which includes an underlaying layer of PVC or other structural plastic, is comprised of vinyl chloride polymer, an organotin maleate and an acrylic blend of an acylic monomer or copolymer resin and an acrylic weatherable impact modifier.
    Type: Application
    Filed: May 31, 2002
    Publication date: January 9, 2003
    Inventors: Charles C. Crabb, Peggy S. Schipper, Stephane J. Girois, Paul A. Ludwig, Christopher A. Bertelo
  • Composition based on high molecular weight organotin maleates which can be used to stabilize thermoplastic polymers, process for producing the said compositions
    Patent number: 5985967
    Abstract: The invention relates to a composition containing high molecular weight organotin maleates as obtained by reacting a high molecular alcohol or epoxyalkane with maleic anhydride and by then bringing the mixture thus obtained into contact with a dialkyltin oxide.The invention also relates to the poly(vinyl chloride) (PVC) compositions stabilized using the said composition based on high molecular weight organotin maleates and also to the extruded rigid items formed from the said PVC compositions.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: November 16, 1999
    Assignees: Elf Atochem North America Inc., Elf Atochem S.A.
    Inventors: Muriel Cuilleret, Patrick Morel, James L. Reilly, Peggy S. Schipper