Patents Represented by Attorney Walter Kirn

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  • UV-absorbing media bleachable by IR-radiation
    Patent number: 5773170
    Abstract: An image-forming element comprising a substrate, and an image-forming medium comprising (a) a compound absorbing at a first wavelength in the UV/blue region and (b) a dye absorbing at a second wavelength which is longer than the first wavelength, irradiation at said second wavelength bleaching absorption of said compound at said first wavelength, said element being free of thermally unstable urea and/or carbamate molecules.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: June 30, 1998
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Ranjan C. Patel, Robert J. D. Nairne