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:
Apr. 12, 2011
Filed:
May. 13, 2008
Giuseppe Claudio Viscomi, Bologna, IT;
Manuela Campana, Bologna, IT;
Dario Braga, Bologna, IT;
Donatella Confortini, Bologna, IT;
Vincenzo Cannata, Bologna, IT;
Paolo Righi, Bologna, IT;
Goffredo Rosini, Bologna, IT;
Giuseppe Claudio Viscomi, Bologna, IT;
Manuela Campana, Bologna, IT;
Dario Braga, Bologna, IT;
Donatella Confortini, Bologna, IT;
Vincenzo Cannata, Bologna, IT;
Paolo Righi, Bologna, IT;
Goffredo Rosini, Bologna, IT;
Alfa Wassermann, S.p.A., Bologna, IT;
Abstract
Crystalline polymorphous forms of rifaximin (INN) antibiotic named rifaximin α and rifaximin β, and a poorly crystalline form named rifaximin γ, useful in the production of medicinal preparations containing rifaximin for oral and topical use and obtained by means of a crystallization carried out by hot-dissolving the raw rifaximin in ethyl alcohol and by causing the crystallization of the product by addition of water at a determinate temperature and for a determinate period of time, followed by a drying carried out under controlled conditions until reaching a settled water content in the end product, are the object of the invention.