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Details for Patent: 7,247,655

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Summary for Patent: 7,247,655

Title:Esters of 5-aminolevulinic acid as photosensitizing agents in photochemotherapy
Abstract:The present invention relates to compounds being esters of 5-aminolevulinic acids or pharmaceutically acceptable salts thereof, including compounds of formula (I) R22N--CH2COCH2--CH2CO--OR1 (wherein R1 may represent alkyl optionally substituted by hydroxy, alkoxy, acyloxy, alkoxycarbonyloxy, amino, aryl, oxo or fluoro groups and optionally interrupted by oxygen, nitrogen, sulphur or phosphorus atoms; and R2 represents a hydrogen atom or a group R1, and both R2 groups may be the identical or different), and their use in diagnosis and photochemotherapy of disorders or abnormalities of external or internal surfaces of the body, and products and kits for performing the invention.
Inventor(s): Gierskcky; Karl E. (Oslo, NO), Moan; Johan (Oslo, NO), Peng; Qian (Oslo, NO), Steen; Harald (Oslo, NO), Warloe; Trond (Oslo, NO), Bjorseth; Alf (Oslo, NO)
Assignee: Photocure ASA (Oslo, NO)
Application Number:10/410,636
Patent Claim Types:
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Composition; Formulation; Compound; Device; Use;

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Foreign Priority and PCT Information for Patent: 7,247,655

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom9504948.2Mar 10, 1995
United Kingdom9525822.4Dec 18, 1995

International Patent Family for Patent: 7,247,655

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
China1137087► Subscribe
Czech Republic9702848► Subscribe
Czech Republic291132► Subscribe
Germany69613365► Subscribe
Germany122006000051► 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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