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:
Jun. 16, 1992
Filed:
Jun. 21, 1990
Janos Kreidl, Budapest, HU;
Csaba Szantay, Budapest, HU;
Lajos Szaho, Budapest, HU;
Maria Farkas nee Kirjak, Budapest, HU;
Gyorgy Kalaus, Budapest, HU;
Katalin Nogradi, Budapest, HU;
Andras Nemes, Budapest, HU;
Judit Meszaros nee Brill, Budapest, HU;
Zsuzsanna Aracs nee Tischler, Budapest, HU;
Bela Stefko, Budapest, HU;
Janos Sapi, Budapest, HU;
Ida Deutsch nee Juhasz, Budapest, HU;
Istvan Hegedus, Budapest, HU;
Bela Benke, Budapest, HU;
Kalman Graf, Budapest, HU;
Kalmam Gaf, Budapest, HU;
Katalin Horvath nee Berki, Budapest, HU;
Richter Gedeon Vegyesczeti Gyar RT., Budapest, HU;
Abstract
New intermediate compounds are disclosed of the formula I, ##STR1## wherein R.sub.1 and R.sub.2 are independently alkyl having 1 to 4 carbon atoms, or acid-addition salts thereof of formula Ib, ##STR2## wherein X represents an acid residue, and a process for the preparation of the intermediate compounds.