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. 03, 1992
Filed:
Mar. 12, 1990
Applicant:
Inventors:
Hiroshi Goda, Hyogo, JP;
Nario Kimura, Hyogo, JP;
Satoshi Kimura, Hyogo, JP;
Naohiro Yoshikawa, Hyogo, JP;
Masaki Teramoto, Hyogo, JP;
Yoshihide Masuda, Hyogo, JP;
Yuuji Matuzaki, Hyogo, JP;
Assignee:
Sumitomo Seika Chemicals, Co., Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549 71 ;
Abstract
There is disclosed a method of producing a thiophene-2,5-dicarboxylic acid diester represented by the formula ##STR1## wherein R' represents an alkyl of 1-8 carbons, a phenyl, a substituted phenyl or benzyl, which comprises: