Patents by Inventor Marshall W. Duke

Marshall W. Duke 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).

  • Patent number: 4028053
    Abstract: A process for rendering cellulose and cellulose containing fabrics fire resistant by first impregnating the fibers with a solution of an aminoplast resin, an acid and an effective amount of a dialkyl phosphono methylol alkylamide to produce fire retardancy in the resulting fabric having the formula ##STR1## wherein R is lower alkyl having 1 to 6 carbon atoms and x is an integer from 1 to 3 and polymerizing the resin while the fibers are wet and swollen. The fabric is then cured, washed and dried. The fabric obtained from this process possesses high fire-retardancy values, soft hand, and tensile values similar to that of the untreated fabric.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: June 7, 1977
    Assignee: United Merchants and Manufacturers, Inc.
    Inventor: Marshall W. Duke
  • Patent number: 3936562
    Abstract: A process for rendering cellulose and cellulose containing fabrics fire resistant by first impregnating the fibers with an aminoplast resin and polymerizing the resin while the fibers are wet and swollen. Thereafter, the fabric is impregnated with tetrakis (hydroxymethyl) phosphonium hydroxide, cured, washed and dried. The fabric obtained from this process possesses high fire-retardency values, soft hand, and tensile values similar to that of the untreated fabric.
    Type: Grant
    Filed: January 21, 1974
    Date of Patent: February 3, 1976
    Assignee: United Merchants and Manufacturers, Inc.
    Inventors: Marshall W. Duke, Razmic S. Gregorian