Patents by Inventor Teruhide Haga

Teruhide Haga 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).

  • Chemical development of a silver halide emulsion containing an arylonium salt on a polyester film support
    Patent number: 4013469
    Abstract: Light-sensitive silver halide photographic materials containing, as an anti-foggant, a compound of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually an aryl or aralkyl group; Z is N, P, As or Sb; and X is an anion. The compositions are particularly suitable for use on polyester supports.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: March 22, 1977
    Inventors: Teruhide Haga, Koichi Horigome, Mitsuo Ebisawa