Patents Represented by Attorney Gregory A. Everaritt

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  • Method of producing polymethine dyes
    Patent number: 5386058
    Abstract: A method for producing polymethine dyes comprising the steps of:(a) reacting a 1,1-diaryl-2-metallo-ethene with an .omega., .omega.,-diaryl-polyalkene-aldehyde in an anhydrous solvent under an inert atmosphere; and(b) neutralizing the reaction mixture from step (a) with an acid, thereby producing a polymethine dye.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: January 31, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Roger A. Mader