Patents by Inventor Armand P. Zinnato

Armand P. Zinnato 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).

  • Method for producing stain resistant polyamide fibers
    Patent number: 4780099
    Abstract: Polyamide fibers are made stain resistant by treating them with a sulfonated naphthol- or sulfonated phenol-formaldehyde condensation product. Applying the stain-resist compounds at pH values of between 1.5 and 2.5 renders them stable to yellowing upon exposure to agents in the environment such as NO.sub.2.
    Type: Grant
    Filed: August 26, 1986
    Date of Patent: October 25, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Imrich Greschler, Creighton P. Malone, Armand P. Zinnato
  • Cold water-soluble acid dye composition derived from the standardization of mono- and disazo acid dyes with an ammonium lignin sulfonate
    Patent number: 4153414
    Abstract: Cold water-soluble dye compositions consisting essentially of from 20-70% by weight of a sparingly soluble sulfonated, mono- or disazo acid dye, substantially in the form of its alkali metal salt, and from 80-30% by weight of an ammonium lignin sulfonate. The ammonium lignin sulfonate is used as a standardizing agent to adjust the strength of the concentrated acid dye to a level suitable for use in commercial dyeing and printing operations and to provide cold water solubility adequate for dyeing at ambient temperatures.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: May 8, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles D. Ver Nooy, III, Armand P. Zinnato