Patents by Inventor Harold E. Jordan

Harold E. Jordan 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).

  • High contrast photographic emulsions and elements and processes for their development
    Patent number: 4650746
    Abstract: This invention relates to a photographic element comprising a support, and coated on the support at least one negative-working photographic emulsion comprising radiation-sensitive silver halide grains capable of forming a surface latent image and a binder, and in the support or in a remaining hydrophilic colloid layer coated on the support in an amount sufficient to increase contrast, a hydrazine compound of the formula ##STR1## wherein R.sup.1 is a phenyl nucleus having a Hammet sigma value-derived electron withdrawing characteristic of less than +0.30.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: March 17, 1987
    Assignee: Eastman Kodak Company
    Inventors: Joseph M. Simson, Harold E. Jordan