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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Chinese Patent Office
Boehringer Ingelheim
Harvard Business School
Queensland Health

Generated: November 22, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,717,720

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Summary for Patent: 4,717,720

Title: Benzonaphthalene derivatives and compositions
Abstract:A benzonaphthalene compound has the formula ##STR1## wherein R.sub.1 represents (i) ##STR2## or (ii) --CH.sub.2 OH; R.sub.6 represents ##STR3## or OR.sub.7 wherein R.sub.7 represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl or polyhydroxyalkyl, r' or r" represent hydrogen, lower alkyl, mono or polyhydroxyalkyl, aryl or a residue of an amino acid or a sugar, or together form a heterocycle; R.sub.2 represents hydrogen, alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or a cycloaliphatic radical; R.sub.3 represents hydrogen, hydroxy, alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, a cycloaliphatic radical, a thiocycloaliphatic radical or --O--Si(CH.sub.3).sub.2 --R.sub.8 wherein R.sub.8 represents lower alkyl; and R.sub.4 and R.sub.5 represent hydrogen, lower alkyl, hydroxy or lower acyloxy. This compound is useful in the topical and systemic treatment of dermatologic diseases and in the treatment of the degeneration of conjuctive tissues. The compound also possesses anti-tumor activity.
Inventor(s): Shroot; Braham (Antibes, FR), Eustache; Jacques (Grasse, FR), Bernardon; Jean-Michel (Nice, FR)
Assignee: Centre International de Recherches Dermatologiques (C.I.R.D.) (Valbonne, FR)
Application Number:06/850,145
Patent Claim Types:
see list of patent claims
Compound; Composition;

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Foreign Priority and PCT Information for Patent: 4,717,720

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Luxembourg85849Apr 11, 1985

International Patent Family for Patent: 4,717,720

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office0199636► Subscribe300209Netherlands► Subscribe
Germany3662038► Subscribe
Germany10199023► Subscribe
Denmark162286► Subscribe
Denmark172070► Subscribe
Spain554186► Subscribe
Finland88793► Subscribe
Finland861510► Subscribe
Spain8705845► Subscribe
Finland87762► 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:

Queensland Health
Farmers Insurance
US Army

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