Hiroshi Ishidai 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).
Abstract: A silver halide color photographic light sensitive material comprising a magenta coupler of Formula is disclosed. ##STR1## In the formula R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each represent a hydrogen atom, an aliphatic group, aromatic group or heterocyclic group, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each are same or different, the aliphatic group and aromatic group each may have a substituent(s); R.sup.6 and R.sup.7 each represent a hydrogen atom or a substituent, wherein R.sup.6 and R.sup.7 each are same or different and may form a dioxane ring, and the dioxane ring may have a substituent (s); X is a hydrogen atom, or a group or atom which is released upon the reaction with the oxidation product of developing agent; Z.sub.1 is a non-metal group to form a 5-membered cycle in combination with a nitrogen atom; the cycle represented by X may have a sustituent(s).
January 10, 1994
Date of Patent:
November 29, 1994
Hiroshi Ishidai, Hiroshi Kita, Yutaka Kaneko, Koji Daifuku