Patents Represented by Attorney Gary G. Griswold

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  • Water-based pigmented inks
    Patent number: 5840106
    Abstract: Water-based pigmented inks are disclosed. Such inks are formed from water-based dispersions of pigment particles having novel dispersants therein. The dispersions are formed from the reaction product of an alkenyl azlactone with an N-substituted amino acid compound. Subsequent to the reaction, the reaction product is ring-opened using an amine and, optionally, hydrolyzed. The resulting inks are well-suited for use in ink jet and other printing applications.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: November 24, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Larry R. Krepski, Richard J. Kuo, Prabhakara S. Rao, Terrance P. Smith
  • Colony blotting method and device
    Patent number: 5137812
    Abstract: A method and article for the identification of colonies of microbes involves the use of a reconstitutable dry culture medium plate in combination with a transfer membrane. Microbe-specific antigen can be extracted from the surface of the growth medium of the plate and its presence determined, e.g., by immunoassay.
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: August 11, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard R. Matner