Patents Examined by Theodore E. Petrilla
  • Stain-resistant agents for textiles
    Patent number: 4883839
    Abstract: Stain-resistant compositions comprising sulfonated phenol-formaldehyde condensation products and polymers of ethylenically unsaturated monomers, polyamide textile substrates treated with the same, and processes for their preparation. The stain-resistant compositions and substrates possess improved stain resistance but do not suffer from yellowing to the extent that previously known materials do.
    Type: Grant
    Filed: December 6, 1988
    Date of Patent: November 28, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Patrick H. Fitzgerald, Nandakumar S. Rao, Yashavant Vinod, Jeffrey R. Alender