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:
Mar. 16, 1976
Filed:
Jun. 12, 1974
Applicant:
Inventors:
Harumi Katsuyama, Asaka, JA;
Hisatake Ono, Asaka, JA;
Assignee:
Fuji Photo Film Co., Ltd., Ashigara, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 2602 / ; 2602 / ; 2603 / ;
Abstract
Spiro-pyrazoline derivatives of the general formula ##SPC1## Where Z.sub.1, Z.sub.2, R.sub.1 to R.sub.4 are as defined hereinafter and methods for their preparation are disclosed. The compounds are useful as organic photoconductors, organic fluorescent materials and as additives for silver salt and non-silver salt photographic materials.