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:
Sep. 13, 1994
Filed:
Dec. 31, 1992
Applicant:
Inventors:
Augusto Lavacchielli, 28100 Novara, IT;
Mirco Fornaroli, 28068 Romentino (No), IT;
Giovanni Colli, 28066 Galliate (No), IT;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546241 ;
Abstract
The invention relates to a method for preparing HMP terfenadine comprising the steps of reacting terfenadone free-base with sodium borohydride to yield mixed polymorph terfenadine and crystallizing said mixed polymorph terfenadine from a seeded ester or ketone solvent system to yield substantially pure HMP terfenadine.