Patents by Inventor Walter Bolger

Walter Bolger 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).

  • Silver halide photographic material
    Patent number: 5079139
    Abstract: A photosensitive photographic material is described comprising a support bearing a silver halide emulsion layer sensitized with a dye of the general formula: ##STR1## wherein Y is S or Se,L.sup.1, L.sup.2, L.sup.3, L.sup.4 and L.sup.5 are each independently substituted or unsubstituted methine groups,A is N--R.sup.3 or O,B is N--R.sup.4 when A is O, or N--R.sup.4, S, or O when A is N--R.sup.3,R.sup.1 and R.sup.2 are each a substituted or unsubstituted alkyl group,R.sup.3 and R.sup.4 are each a substituted or unsubstituted alkyl or a substituted or unsubstituted aryl group,R.sup.5 is an alkyl group of 1-4 carbon atoms,n is 0, 1 or 2, andX is counterion,and wherein at least two of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are substituted with an acid or acid salt substituent.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: January 7, 1992
    Assignee: Eastman Kodak Company
    Inventors: Walter Bolger, John D. Mee, Kenneth G. Harbison, Hwei-Ling Yau