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Serving leading biopharmaceutical companies globally:

Novartis
Argus Health
Johnson and Johnson
McKinsey
Fish and Richardson
Cantor Fitzgerald
AstraZeneca
Boehringer Ingelheim
Baxter
Queensland Health

Generated: February 20, 2018

DrugPatentWatch Database Preview

Details for Patent: 8,158,781

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Which drugs does patent 8,158,781 protect, and when does it expire?

Patent 8,158,781 protects XIFAXAN and is included in two NDAs.

This patent has eighty-one patent family members in thirty-five countries.
Summary for Patent: 8,158,781
Title:Polymorphic forms .alpha., .beta. and .gamma. of rifaximin
Abstract: Crystalline polymorphous forms of rifaximin (INN) antibiotic named rifaximin .alpha. and rifaximin .beta., and a poorly crystalline form named rifaximin .gamma., 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.
Inventor(s): Viscomi; Giuseppe Claudio (Bologna, IT), Campana; Manuela (Bologna, IT), Braga; Dario (Bologna, IT), Confortini; Donatella (Bologna, IT), Cannata; Vincenzo (Bologna, IT), Righi; Paolo (Bologna, IT), Rosini; Goffredo (Bologna, IT)
Assignee: Alfa Wassermann, S.p.A. (Bologna, IT)
Application Number:13/041,332
Patent Claim Types:
see list of patent claims

Drugs Protected by US Patent 8,158,781

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: 8,158,781

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
ItalyMI2003A2144Nov 07, 2003

Non-Orange Book US Patents Family Members for Patent 8,158,781

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
7,045,620 Polymorphous forms of rifaximin, processes for their production and use thereof in medicinal preparations ➤ Try a Free Trial
7,906,542 Pharmaceutical compositions comprising polymorphic forms .alpha., .beta., and .gamma. of rifaximin ➤ Try a Free Trial
8,404,704 Use of polymorphic forms of rifaximin for medical preparations ➤ Try a Free Trial
7,915,275 Use of polymorphic forms of rifaximin for medical preparations ➤ Try a Free Trial
8,158,644 Pharmaceutical compositions comprising polymorphic forms .alpha., .beta., and .gamma. of rifaximin ➤ Try a Free Trial
8,835,452 Polymorphic forms .alpha., .beta. and .gamma. of rifaximin ➤ Try a Free Trial
8,173,801 Processes for the production of polymorphic forms of rifaximin ➤ Try a Free Trial
7,923,553 Processes for the production of polymorphic forms of rifaximin ➤ Try a Free Trial
7,612,199 Polymorphic forms .alpha., .beta., and .gamma. of rifaximin ➤ Try a Free Trial
7,902,206 Polymorphic forms .alpha., .beta. and .gamma. of rifaximin ➤ Try a Free Trial
Patent No. Title Estimated Patent Expiration

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International Patents Family Members for US Patent 8,158,781

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Ukraine 86384 ➤ Try a Free Trial
Taiwan I285107 ➤ Try a Free Trial
Taiwan 200515913 ➤ Try a Free Trial
Tunisia SN06069 ➤ Try a Free Trial
Tunisia SN04044 ➤ Try a Free Trial
Slovenia 1676848 ➤ Try a Free Trial
Slovenia 1676847 ➤ Try a Free Trial
Slovenia 1557421 ➤ Try a Free Trial
Russian Federation 2270200 ➤ Try a Free Trial
Russian Federation 2004108953 ➤ 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:

Cerilliant
Healthtrust
Express Scripts
Dow
Argus Health
Cipla
Accenture
AstraZeneca
Citi

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verifification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.

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