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. 12, 1999
Filed:
Oct. 20, 1997
Applicant:
Inventors:
Vincenzo Cannata, Borgo Nuovo di Pontecchio Marconi, IT;
Tiziano Ferrario, Ceriano Laghetto, IT;
Barbara Galbiati, Milan, IT;
Assignee:
Alfa Chemicals Italiana S.r.l., Bergamo, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544291 ; 544284 ; 544295 ;
Abstract
The process for the production of form I of anhydrous terazosin monohydrochloride consists of heating terazosin suspended in a mixture made by methanol and a solvent selected from C.sub.2 to C.sub.6, straight or branched alcohols, esters of C.sub.1 -C.sub.8 aliphatic carboxylic acids with straight or branched C.sub.1 to C.sub.8 alcohols, C.sub.3 to C.sub.8 aliphatic ketones, C.sub.4 to C.sub.8 straight branched or cyclic aliphatic ethers, aliphatic amides and aliphatic nitriles with a methanol solution of hydrochloric acid.