Patents by Inventor Jean M. Zappia

Jean M. Zappia 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).

  • Stabilized rigid polyvinyl chloride compositions
    Patent number: 4822833
    Abstract: Rigid polyvinyl chloride stabilized against the adverse effects of ultraviolet radiation by the addition thereto of effective amounts of 2,2,6,6-tetraalkylpiperidine compound and an organotin carboxylate thermal stabilizer, optionally with reduced amounts of titanium dioxide, organotin mercapto esters and/or organotin mercaptide thermal stabilizers.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: April 18, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Jean M. Zappia, Gerald A. Capocci
  • Benzoate-stabilized rigid polyvinyl chloride compositions
    Patent number: 4619957
    Abstract: Rigid polyvinyl chloride containing reduced amounts of titanium dioxide and a tin mercaptide thermal stabilizer, said polyvinyl chloride being stabilized against the adverse effects of ultraviolet radiation by the addition thereto of effective amounts of benzoate compounds.
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: October 28, 1986
    Assignee: Ciba-Geigy Corporation
    Inventors: William J. Reid, Jean M. Zappia, Gerald A. Capocci, John D. Spivack
  • Benzoate-stabilized rigid polyvinyl chloride compositions
    Patent number: 4555541
    Abstract: Rigid polyvinyl chloride containing reduced amounts of titanium dioxide and a tin mercaptide thermal stabilizer, said polyvinyl chloride being stabilized against the adverse effects of ultraviolet radiation by the addition thereto of effective amounts of mono- and dibenzoate compounds.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: November 26, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: William J. Reid, Jean M. Zappia, Gerald A. Capocci, John D. Spivack