Patents by Inventor Albert E. Van Hoof

Albert E. Van Hoof 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 polymeric mordanting agents for anionic compounds
    Patent number: 4266044
    Abstract: Mordanting agents for anionic organic compounds are described which comprise recurring units of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl; A is methylene or methylene substituted by C.sub.1 -C.sub.5 alkyl;n is 0 or 1;R.sub.2 is alkyl, andX is an acid radical.They are particularly suitable for hindering diffusion of dyes in hydrophilic colloid media e.g. hydrophilic colloid layers of a photographic silver halide element, for hindering diffusion of color couplers in such layers e.g. layers of a radiographic silver halide color element and for the formation of color images by the relief imbibition process.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: May 5, 1981
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Daniel M. Timmerman, Walter F. De Winter, Albert E. Van Hoof
  • Silver halide element with polymeric mordanting agents for anionic compounds
    Patent number: 4145220
    Abstract: Mordanting agents for anionic organic compounds are described which comprise recurring units of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl; A is methylene or methylene sustituted by C.sub.1 -C.sub.5 alkyl;N is 0 or 1;R.sub.2 is alkyl, andX is an acid radical.They are particularly suitable for hindering diffusion of dyes in hydrophilic colloid media e.g. hydrophilic colloid layers of a photographic silver halide element, for hindering diffusion of color couplers in such layers e.g. layers of a radiographic silver halide color element and for the formation of color images by the relief imbibition process.
    Type: Grant
    Filed: December 30, 1971
    Date of Patent: March 20, 1979
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Daniel M. Timmerman, Walter F. De Winter, Albert E. Van Hoof