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:
Jan. 20, 1976
Filed:
Dec. 13, 1974
Applicant:
Inventors:
Atsuaki Arai, Minami-ashigara, JA;
Daijiro Nishio, Odawara, JA;
Mitsugu Tanaka, Minami-ashigara, JA;
Yoshikazu Fujita, Odawara, JA;
Hisao Suzuki, Odawara, JA;
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09F / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
2604045 ; 260470 ; 2604 / ;
Abstract
A method for the preparation of a .beta.-anilino-.beta.-hydrazinoacrylate which comprises reacting a .beta.-anilino-.beta.-alkoxyacrylate with a hydrazine. .beta.-Anilino-.beta.-hydrazinoacrylates are valuable intermediates in preparing 3-anilino-5-pyrazolone magenta color-forming couplers and the method of the present invention can be applied particularly to the preparation of 3-anilino-5-pyrazolones which have a hydrophobic group on the anilino group.