Patents by Inventor Ronald A. E. Winter

Ronald A. E. Winter 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).

  • N-hydroxy hindered amine stabilizers
    Patent number: 4831134
    Abstract: 1-Hydroxy-2,2,6,6,-tetraalkylpiperidine derivatives are effective as light stabilizers in a variety of substrate systems.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: May 16, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Ronald A. E. Winter, James P. Galbo