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Serving hundreds of leading biopharmaceutical companies globally:

Federal Trade Commission
McKinsey
Argus Health
Teva
Dow
Johnson and Johnson
Daiichi Sankyo
Fish and Richardson
Accenture

Generated: May 25, 2018

DrugPatentWatch Database Preview

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 patent family members in twenty-six 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 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 Patent Submitted
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-001 May 25, 2004 RX Yes Yes ➤ Try a Free Trial ➤ Try a Free Trial Y ➤ Try a Free Trial
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 022554-001 Mar 24, 2010 RX Yes Yes ➤ Try a Free Trial ➤ Try a Free Trial Y ➤ Try a Free Trial
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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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

Non-Orange Book US Patents Family Members for Patent 8,518,949

For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.

The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.

Patent No. Title Estimated Patent Expiration
9,271,968 Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations ➤ Try a Free Trial
8,193,196 Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations ➤ Try a Free Trial
8,741,904 Polymorphous forms of rifaximin, processes for their production and use thereof in the medicinal preparations ➤ Try a Free Trial
Patent No. Title Estimated Patent Expiration

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International Family Members for US Patent 8,518,949

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Ukraine 89809 ➤ Try a Free Trial
Tunisia SN07292 ➤ Try a Free Trial
Tunisia SN07250 ➤ Try a Free Trial
Slovenia 1698630 ➤ Try a Free Trial
Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration

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Serving hundreds of leading biopharmaceutical companies globally:

Express Scripts
Dow
Fuji
Chinese Patent Office
UBS
Deloitte
Covington
Moodys
Harvard Business School

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