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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Queensland Health
US Department of Justice
Fish and Richardson

Generated: December 16, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,412,992

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Summary for Patent: 4,412,992

Title: 2-Hydroxy-5-phenylazobenzoic acid derivatives and method of treating ulcerative colitis therewith
Abstract:The present invention provides a pharmaceutical composition for treating ulcerative colitis containing at least one compound of the general formula: ##STR1## wherein X is an --SO.sub.2 -- or --CO-- group and R is either an unsubstituted or substituted non-heterocyclic aromatic ring system or is a radical of the general formula --(CH.sub.2).sub.n --Y, in which Y is a hydroxyl group, an unsubstituted or substituted amino group or a carboxylic or sulphonic acid group and n is a whole number of from 1 to 6 and in which one or more hydrogen atoms in the alkylene radical can be replaced by unsubstituted or substituted amino groups or alkyl radicals and in which the --(CH.sub.2).sub.n --Y radical is either attached directly to the nitrogen atom or via a benzene ring; and/or containing at least one ester thereof and/or at least one non-toxic, pharmaceutically acceptable salt thereof, in admixture with a solid or liquid pharmaceutical diluent or carrier. Furthermore, the present invention provides a process for preparing the compounds of the above-given general formulae and also provides a method of treating ulcerative colitis.
Inventor(s): Chan; Rosalind P. K. (London, GB2)
Assignee: Biorex Laboratories Limited (GB2)
Application Number:06/281,504
Patent Claim Types:
see list of patent claims
Compound; Use; Composition; Delivery;

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Foreign Priority and PCT Information for Patent: 4,412,992

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom8023826Jul 21, 1980

International Patent Family for Patent: 4,412,992

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Germany3128819► Subscribe
France2493312► Subscribe
United Kingdom2080796► Subscribe
Hong Kong31885► Subscribe
Italy1138450► Subscribe
Italy8122859► Subscribe
JapanS5753449► Subscribe
JapanS6225656► Subscribe
Malaysia8600029► Subscribe
Singapore6885► 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:

Express Scripts
US Department of Justice
Fish and Richardson

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