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Generated: April 30, 2017

DrugPatentWatch Database Preview

Details for Patent: 3,975,536

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Summary for Patent: 3,975,536

Title: Composition
Abstract:There is described a composition comprising a substantially clear, sterile aqueous solution containing as active ingredient a therapeutically useful proportion of 1,3-bis(2-carboxy-chromon-5-yloxy)-propan-2-ol, or a pharmaceutically acceptable (e.g. the di-sodium) salt thereof, or 5,5'-[[5,5'-(2-hydroxytrimethylene)dioxy]bis[4-oxo-4H-1-benzopyran-2-yl]]t etrazole, or a pharmaceutically acceptable (e.g. the di-sodium) salt thereof. The composition is indicated for the treatment of conditions of the eye and the nose.
Inventor(s): Stevenson; Neil Arthur (Loughborough, EN), Wardell; George (Loughborough, EN)
Assignee: Fisons Limited (London, EN)
Application Number:05/471,141
Patent Claim Types:
see list of patent claims
Composition; Formulation; Compound;

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Foreign Priority and PCT Information for Patent: 3,975,536

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
14529/71May 12, 1971
57169/71Dec 9, 1971
25237/73May 25, 1973
25238/73May 25, 1973
26649/73Jun 5, 1973

International Patent Family for Patent: 3,975,536

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia465305► Subscribe
Australia4208072► Subscribe
Belgium782981► Subscribe
Canada1000201► Subscribe
Cyprus955► 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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