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. 05, 1999
Filed:
Oct. 21, 1997
Applicant:
Inventors:
Assignee:
ALFA Chemicals Italiana S.R.L., Bergamo, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544291 ; 514260 ;
Abstract
The process for the production of the form I of the terazosin monohydrochloride anhydrous consists of treating at the boiling temperature terazosin monohydrochloride dihydrate with a mixture of methanol and a solvent selected from C.sub.2 -C.sub.6 straight or branched alcohols, the esters of the C.sub. -C.sub.8 carboxylic aliphatic acids with C.sub.1 -C.sub.8 straight or branched 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 the aliphatic nitriles.