Patents by Inventor Charlene White

Charlene White 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).

  • Polyolefin compositions stabilized against degradation using hydroxylamine derivatives
    Patent number: 4668721
    Abstract: N,N-Dibenzylhydroxylamine and other selected hydroxylamine derivatives are effective in stabilizing polyolefin compositions containing a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the hindered amine light stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids and the thiosynergists, against degradation upon high temperature extrusion, exposure to the combustion products of natural gas, gamma irradiation or upon storage for extended periods.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: May 26, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Raymond Seltzer, Ambelal R. Patel, Peter W. Stewart, Charlene White
  • Polyolefin compositions stabilized against degradation using hydroxylamine derivatives
    Patent number: 4590231
    Abstract: N,N-Dibenzylhydroxylamine and other selected hydroxylamine derivatives are effective in stabilizing polyolefin compositions containing a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the hindered amine light stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids and the thiosynergists, against degradation upon high temperature extrusion, exposure to the combustion products of natural gas, gamma irradiation or upon storage for extended periods.
    Type: Grant
    Filed: July 23, 1984
    Date of Patent: May 20, 1986
    Assignee: Ciba-Geigy Corporation
    Inventors: Raymond Seltzer, Ambelal R. Patel, Peter W. Stewart, Charlene White