Patents by Inventor Mark David Graham

Mark David Graham 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).

  • Optical brightening agents
    Patent number: 5873913
    Abstract: Optical brightening agents for use in textiles, paper, detergents correspond to the formula ##STR1## where R, R.sub.1 are preferably derived from amino-acids, particularly glutamic and iminodiacetic acids.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: February 23, 1999
    Assignee: Clariant Finance (BVI) Limited
    Inventors: John Stuart Cowman, John Martin Farrar, Mark David Graham, Neil Mackinnon