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:
Nov. 01, 1977
Filed:
Nov. 05, 1976
Applicant:
Inventors:
Mitsuhiro Goi, Hirakata, JA;
Masahiko Miyashita, Hirakata, JA;
Assignee:
Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560126 ;
Abstract
Process for preparing succinylsuccinic acid diesters by subjecting .gamma.-haloacetoacetic acid esters to dimerization in the presence of a base in a mixed medium of alcohol and water containing a specific amount of a water-immiscible organic compound. The succinylsuccinic acid diesters with good quality can be prepared in high yields and can be employed effectively as intermediates for quinacridone pigment.