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Last Updated: August 4, 2021

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Details for Patent: 8,518,949

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Which drugs does patent 8,518,949 protect, and when does it expire?

Patent 8,518,949 protects XIFAXAN and is included in two NDAs.

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

Summary for Patent: 8,518,949
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 Miriam (Bologna, IT), Braga; Dario (Bologna, IT)
Assignee: ALFA Wassermann S.p.A. (Alanno (PE), IT)
Application Number:13/488,345
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,518,949
Patent Claim Types:
see list of patent claims
Use; Compound; Formulation; Process; Composition; Dosage form;

Drugs Protected by US Patent 8,518,949

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 ⤷  Free Forever Trial ⤷  Free Forever Trial Y ⤷  Free Forever Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes ⤷  Free Forever Trial ⤷  Free Forever Trial Y ⤷  Free Forever 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: 8,518,949

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
05004695Mar 03, 2005

International Family Members for US Patent 8,518,949

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2006222312 ⤷  Free Forever Trial
Brazil PI0608073 ⤷  Free Forever Trial
Canada 2594789 ⤷  Free Forever Trial
China 1900077 ⤷  Free Forever Trial
Denmark 1698630 ⤷  Free Forever Trial
European Patent Office 1698630 ⤷  Free Forever Trial
Spain 2522895 ⤷  Free Forever Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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Serving leading biopharmaceutical companies globally:

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