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Last Updated: September 27, 2020

DrugPatentWatch Database Preview

Details for Patent: 8,741,904

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Which drugs does patent 8,741,904 protect, and when does it expire?

Patent 8,741,904 protects XIFAXAN and is included in two NDAs.

This patent has thirty-six patent family members in twenty-seven countries.

Summary for Patent: 8,741,904
Title:Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations
Abstract: Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin .delta. and rifaximin .epsilon. useful in the production of medicinal preparations containing rifaximin for oral and topical use and obtained by means of a crystallization process 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.
Inventor(s): Viscomi; Giuseppe Claudio (Sasso Marconi, IT), Campana; Manuela (Bologna, IT), Confortini; Donatella (Calderara di Reno, IT), Barbanti; Maria (Bologna, IT), Braga; Dario (Bologna, IT)
Assignee: Alfa Wassermann S.p.A. (IT)
Application Number:13/950,642
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,741,904
Patent Claim Types:
see list of patent claims
Use; Composition; Delivery; Dosage form;

Drugs Protected by US Patent 8,741,904

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-001 May 25, 2004 RX Yes Yes   Start Trial   Start Trial Y THE TREATMENT OF PATIENTS WITH TRAVELERS' DIARRHEA (TD) OR THE REDUCTION IN RISK OF OVERT HEPATIC ENCEPHALOPATHY (HE) RECURRENCE   Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes   Start Trial   Start Trial Y THE TREATMENT OF PATIENTS WITH TRAVELERS' DIARRHEA (TD) OR THE REDUCTION IN RISK OF OVERT HEPATIC ENCEPHALOPATHY (HE) RECURRENCE   Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes   Start Trial   Start Trial Y TREATMENT OF IRRITABLE BOWEL SYNDROME WITH DIARRHEA (IBS-D) IN ADULTS AND SYMPTOMS THEREOF.   Start Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes   Start Trial   Start Trial Y TREATMENT OF IRRITABLE BOWEL SYNDROME WITH DIARRHEA (IBS-D) IN ADULTS.   Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

Foreign Priority and PCT Information for Patent: 8,741,904

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
05004695Mar 3, 2005

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Serving leading biopharmaceutical companies globally:

Johnson and Johnson
Mallinckrodt
AstraZeneca
Merck
Baxter
McKesson

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