Patents by Inventor Donald Warren Heseltine

Donald Warren Heseltine 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).

  • Novel UV absorbing compounds and photographic elements containing UV absorbing compounds
    Patent number: 4045229
    Abstract: 1-Amino-4-cyano-1,3-butadiene compounds of the formula ##STR1## WHEREIN N IS 1 OR 2, WHEN N IS 1 R.sub.1 and R.sub.2 can be the same or different and represent hydrogen, alkyl including substituted alkyl, aryl including substituted aryl or cyclic alkyl groups, except that both R.sub.1 and R.sub.2 cannot be hydrogen, or taken together R.sub.1 and R.sub.2 represent the elements necessary to complete a cyclic amino group and when n is 2 at least one of R.sub.1 and R.sub.2 is alkylene or arylene; G represents an electron withdrawing group. The compounds are especially useful in photographic elements as UV absorbers.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: August 30, 1977
    Assignee: Eastman Kodak Company
    Inventors: Wayne Woodrow Weber, II, Donald Warren Heseltine
  • Photographic emulsions containing methine dyes having a 1H-imidazo[4,5-b]pyrazine nucleus
    Patent number: 4007170
    Abstract: Light-sensitive photographic emulsions are provided which feature at least one methine dye containing a silver halide sensitizing 1H-imidazo[4,5-b]pyrazine nucleus.
    Type: Grant
    Filed: June 26, 1974
    Date of Patent: February 8, 1977
    Assignee: Eastman Kodak Company
    Inventors: Wilbur Seth Gaugh, Donald Warren Heseltine, David Michael Sturmer, John Paul Freeman
  • Photographic emulsions containing methine dyes having a 1H-imidazo[4,5-b]pyrazine nucleus
    Patent number: 3936308
    Abstract: Light-sensitive photographic emulsions are provided which feature at least one methine dye containing a 1H-imidazo[4,5-b]pyrazine nucleus.
    Type: Grant
    Filed: August 16, 1973
    Date of Patent: February 3, 1976
    Assignee: Eastman Kodak Company
    Inventors: Wilbur Seth Gaugh, Donald Warren Heseltine, David Michael Sturmer, John Paul Freeman
  • Novel UV absorbing compounds and photographic elements containing UV absorbing compounds
    Patent number: T972001
    Abstract: 1-Amino-4-cyano-1,3-butadiene compounds of the formula ##STR1## WHEREIN N IS 1 OR 2; WHEN N IS 1, R.sub.1 and R.sub.2 are the same or different and represent hydrogen, alkyl including substituted alkyl, aryl including substituted aryl or cyclic alkyl groups, except that both R.sub.1 and R.sub.2 cannot be hydrogen, or taken together R.sub.1 and R.sub.2 represent the elements necessary to complete a cyclic amino group and, when n is 2, at least one of R.sub.1 and R.sub.2 is alkylene or arylene; G represents an electron withdrawing group. The compounds are especially useful in photographic elements as UV absorbers.
    Type: Grant
    Filed: January 25, 1977
    Date of Patent: July 4, 1978
    Assignee: Eastman Kodak Company
    Inventors: Wayne Woodrow Weber, II, Donald Warren Heseltine