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. 10, 1989
Filed:
Jan. 20, 1987
Setsuro Fujii, Toyonaka, JP;
Kazuo Ogawa, Tokushima, JP;
Toshihiro Hamakawa, Naruto, JP;
Yoshiyuki Muranaka, Tokushima, JP;
Taiho Pharmaceutical Company Limited, Tokyo, JP;
Abstract
A sulfonic acid ester derivative represented by the general formula ##STR1## wherein R.sub.1 is a hydrogen atom, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, A is a group represented by the general formula ##STR2## (wherein R.sub.2 and R.sub.3 are each alkyl having 1 to 4 carbon atoms) or by the general formula ##STR3## (wherein R.sub.4 and R.sub.5 are each alkyl having 1 to 4 carbon atoms or, when taken together with the carbon atom to which they are attached, form cycloalkyl having 4 to 6 carbon atoms), and l is an integer of from 1 to 3, and a process for preparing the derivative.