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Serving leading biopharmaceutical companies globally:

Cerilliant
Argus Health
Julphar
Teva
Baxter
Moodys
Colorcon
Daiichi Sankyo
UBS
Chinese Patent Office

Generated: October 17, 2017

DrugPatentWatch Database Preview

Details for Patent: 8,946,252

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Which drugs does patent 8,946,252 protect, and when does it expire?


Patent 8,946,252 protects XIFAXAN and is included in one NDA. There has been one Paragraph IV challenge on Xifaxan.

This patent has thirty-two patent family members in eleven countries.

Summary for Patent: 8,946,252

Title:Methods of treating traveler's diarrhea and hepatic encephalopathy
Abstract: Treatment of traveler's diarrhea using in subjects having hepatic encephalopathy using gastrointestinal specific antibiotics is disclosed. One example of a gastrointestinal specific antibiotic is rifaximin.
Inventor(s): Forbes; William (Raleigh, NC), Bortey; Enoch (Chapel Hill, NC)
Assignee: Salix Pharmaceuticals, Ltd (Raleigh, NC)
Application Number:13/654,978
Patent Claim Types:
see list of patent claims
Use; Dosage form;

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Salix Pharms
XIFAXAN
rifaximin
TABLET;ORAL022554-001Mar 24, 2010RXYesYes► Subscribe► Subscribe REDUCTION IN RISK OF OVERT HEPATIC ENCEPHALOPATHY (HE) RECURRENCE
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Non-Orange Book Patents for Patent: 8,946,252

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
9,421,195Methods of treating hepatic encephalopathy► Subscribe
7,928,115Methods of treating travelers diarrhea and hepatic encephalopathy► Subscribe
8,829,017Methods of treating traveler's diarrhea and hepatic encephalopathy► Subscribe
8,969,398Methods of treating hepatic encephalopathy► Subscribe
9,629,828Methods of treating traveler's diarrhea and hepatic encephalopathy► Subscribe
8,642,573Methods of treating hepatic encephalopathy► Subscribe
9,629,829Methods of treating hepatic encephalopathy► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Because of the complexity of determining patent expiration dates it is advisable to have patent counsel verify freedom to operate.

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International Patent Family for Patent: 8,946,252

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office2437603► Subscribe
Canada2765577► Subscribe
China102245615► Subscribe
China102548408► Subscribe
China102625701► Subscribe
European Patent Office2350096► Subscribe
Israel212055► Subscribe
Japan2012504649► Subscribe
Japan6037615► Subscribe
Japan2015166381► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving leading biopharmaceutical companies globally:

McKinsey
Daiichi Sankyo
Colorcon
Dow
Fish and Richardson
Healthtrust
Cantor Fitzgerald
Boehringer Ingelheim
Accenture
Chinese Patent Office

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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