The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1976
Filed:
May. 24, 1974
Applicant:
Inventors:
Nobuo Soma, Hiro, JA;
Isao Kawamoto, Hiro, JA;
Tomio Nakajima, Shin, JA;
Sadao Sugita, Hanno, JA;
Tsuneo Wada, Machida, JA;
Shizuo Saito, Hachioji, JA;
Hiroyuki Inokuma, Chofu, JA;
Koichi Horigome, Tokyo, JA;
Yukio Morifuji, Hachioji, JA;
Assignees:
Konishiroku Photo Industry Co., Tokyo, JA;
Sankyo Company Limited, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
96 7 / ; 96 8 / ; 96109 ;
Abstract
Substances of the structure ##EQU1## wherein Z is phosphorus, X.sup.-is Cl.sup.-, Br.sup.-, ClO.sub.2 .sup.- or BF.sub.4 .sup.-, and R.sub.1 - R.sub.4 are alkyl or aromatic groups are excellent inhibitors of fog formation when incorporated in photographic emulsions containing silver halides.