Patents by Inventor Raymond L. Hackert

Raymond L. Hackert 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).

  • Process for retaining fiber whiteness
    Patent number: 5064595
    Abstract: More whiteness, especially for nylon fibers, is retained when a finish is used to provide to the fiber surface an effective amount of a phenyl phosphinate. Potassium phenyl phosphinate, in amounts as small as 0.005% to 0.3% by weight of the fiber, is particularly effective.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: November 12, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Raymond L. Hackert