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Serving leading biopharmaceutical companies globally:

Farmers Insurance
Fish and Richardson
Harvard Business School

Generated: October 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,997,841

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Summary for Patent: 4,997,841

Title: Indole derivatives
Abstract:Compounds are disclosed of formula (I) ##STR1## wherein R.sub.1 represents H or C.sub.1-6 alkyl; R.sub.2 represents H or C.sub.1-6 alkyl; R.sub.3 represents H; R.sub.4 represents H or C.sub.1-3 alkyl; and pharmaceutically acceptable salts and solvates (for example hydrates thereof. The compounds are indicated as useful for the treatment of migraine, cluster headache, chronic paroxysmal hemicrania and headache associated with vascular disorders. Processes and intermediates for their preparation and pharmaceutical compositions containing them are also disclosed.
Inventor(s): Oxford; Alexander W. (Royston, GB), Sutina; Darko (Arlesey, GB), Owen; Martin R. (Puckeridge, GB)
Assignee: Glaxo Group Limited (GB2)
Application Number:07/231,274
Patent Claim Types:
see list of patent claims
Compound; Use; Composition; Dosage form;

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Foreign Priority and PCT Information for Patent: 4,997,841

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom8719167Aug 13, 1987
United Kingdom8814002Jun 14, 1988
United Kingdom8814481Jun 17, 1988

International Patent Family for Patent: 4,997,841

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
United Kingdom8814481► Subscribe
Hong Kong86793► Subscribe
CroatiaP940625► Subscribe
HungaryT50326► Subscribe
Hungary202225► Subscribe
Hungary211576► Subscribe
Ireland882477► Subscribe
Ireland61488► Subscribe
Israel87437► Subscribe
Spain2058292► 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:

Farmers Insurance
Argus Health
US Army
Cantor Fitzgerald

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