BioPharmaceutical Business Intelligence

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Serving leading biopharmaceutical companies globally:

Fish and Richardson
Farmers Insurance
US Army
Harvard Business School
Cantor Fitzgerald
Queensland Health
Daiichi Sankyo

Generated: December 15, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,772,473

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Summary for Patent: 4,772,473

Title: Nitrofurantoin dosage form
Abstract:The invention involves a combination sustained release/rapid release pharmaceutical capsule for oral administration of nitrofurantoin comprising, in a capsule shell, a first layer of a first particulate mixture comprising nitrofurantoin, polyvinylpyrrolidone and carboxyvinylpolymer; and a second layer of a second particulate mixture comprising macrocrystalline nitrofurantoin.
Inventor(s): Patel; Vikram S. (Norwich, NY), Welles; Harry L. (Norwich, NY)
Assignee: Norwich Eaton Pharmaceuticals, Inc. (Norwich, NY)
Application Number:06/874,943
Patent Claim Types:
see list of patent claims
Composition; Dosage form;

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International Patent Family for Patent: 4,772,473

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria398166► Subscribe
AustriaA151687► Subscribe
Australia592731► Subscribe
Australia7421187► Subscribe
Canada1288050► Subscribe
Germany3772113► Subscribe
Denmark173432► Subscribe
Denmark306487► Subscribe
European Patent Office0250023► Subscribe
Ireland60661► 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:

Queensland Health
Boehringer Ingelheim
US Department of Justice
Federal Trade Commission
Fish and Richardson

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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