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:
Jul. 25, 1978
Filed:
Oct. 21, 1975
Applicant:
Inventors:
Csaba Szantay, Budapest, HU;
Lajos Szabo, Budapest, HU;
Laszlo Toke, Budapest, HU;
Istvan Toth, Budapest, HU;
Sandor Virag, Budapest, HU;
Erzsebet Kanyo, Budapest, HU;
Agoston David, Budapest, HU;
Assignee:
Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt., Budapest, HU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 2602 / ; 2602 / ; 2602 / ; 544126 ; 424258 ;
Abstract
A process for the preparation of a compound of the formula I or a salt thereof ##STR1## wherein R.sup.1 and R.sup.2 each represent hydrogen or a C.sub.1-4 alkoxy group, or together form a methylenedioxy group;