Patents by Inventor Robert C. Buck

Robert C. Buck 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).

  • Substrates treated with bis(hydroxyphenyl)sulfone stain-resists
    Patent number: 5460891
    Abstract: Polyamide fibrous substrates which resist staining by acid dyes and discoloration upon exposure to UV light, and processes for preparing the same which comprise applying, at pH 2 to 10, a base-catalyzed condensation product formed by the reaction of a bis(hydroxyphenyl)sulfone with formaldehyde to give a product known as a resole.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: October 24, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert C. Buck, Engelbert Pechhold, Donald D. May
  • Substrates treated with bis(hydroxyphenyl) sulfone stain-resists
    Patent number: 5447755
    Abstract: Polyamide fibrous substrates which resist staining by acid dyes and discoloration upon exposure to UV light, and processes for preparing the same which comprise applying, at pH 2 to 10, a base-catalyzed condensation product formed by the reaction of a bis(hydroxyphenyl)sulfone with formaldehyde to give a product known as a resole.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: September 5, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Engelbert Pechhold, Robert C. Buck, Donald D. May