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Generated: December 18, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,657,900

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Summary for Patent: 4,657,900

Title: Pharmaceutical article of manufacture comprising a bisulfite stabilized aqueous solution of 5-aminosalicylic acid and method
Abstract:An aqueous suspension of pure 5-aminosalicylic acid adapted for rectal administration is rendered storage stable against color formation by storing the suspension in a single dose polyethylene bottle adapted for rectal administration of the suspension, in a substantially oxygen-free atmosphere and in the presence dissolved therein of up to about 0.25% of bisulfite and protecting the suspension from exposure to atmospheric oxygen during storage by sealing the plastic bottle, in a substantially oxygen-free atmosphere, in a plastic pouch having a low oxygen transmission rate.
Inventor(s): Powell; David R. (Baudette, MN), Patel; Vithal K. (Baudette, MN)
Assignee: Rowell Laboratories (Baudette, MN)
Application Number:06/717,062
Patent Claim Types:
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Formulation; Use; Composition;

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International Patent Family for Patent: 4,657,900

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Germany3773657► Subscribe
European Patent Office0279093► Subscribe
Spain2026179► Subscribe
Israel81799► 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:

Cantor Fitzgerald
Farmers Insurance
Express Scripts
US Department of Justice
Harvard Business School

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