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Generated: December 12, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,585,597

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Summary for Patent: 4,585,597

Title: 3-benzylidene-camphors, process for their preparation and their use in protection against UV rays
Abstract:The invention relates to new 3-benzylidene-camphor derivatives of the formula: ##STR1## in which R.sub.1 denotes H or SO.sub.3.sup..crclbar. M.sup..sym., with M=H, an alkali metal or N.sup..sym. (R.sub.3).sub.4, with R.sub.3 =H or C.sub.1 -C.sub.4 alkyl or hydroxyalkyl; R.sub.2 denotes C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy and n=0-4; and Z denotes ##STR2## in which R.sub.4 has the same meaning as R.sub.1 and can be identical or different, or alternatively ##STR3## in which R.sub.5 denotes H, optionally substituted aryl, C.sub.1 -C.sub.4 alkyl, --CN, --COOR7 or ##STR4## and R.sub.6 denotes --COOR.sub.8 or ##STR5## in which R.sub.7 and R.sub.8, which are identical or different, denote alkyl, alkenyl, cycloalkyl or aralkyl and R.sub.9 and R.sub.10, which are identical or different, denote H, alkyl, alkenyl or cycloalkyl; if R.sub.5 =H, alkyl or aryl, R.sub.6 can represent --COO.sup..crclbar. M.sup..sym. ; the methylidene-camphor radical, on the one hand, and the radical Z, on the other hand, are in the meta or para position. These derivatives act as sun filters.
Inventor(s): Lang; Gerard (Saint Gratien, FR), Leduc; Madeleine (Paris, FR), Malaval; Alain (Aulnay-sous-Bois, FR)
Assignee: L'Oreal (Paris, FR)
Application Number:06/505,090
Patent Claim Types:
see list of patent claims
Compound; Formulation; Composition; Use;

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Foreign Priority and PCT Information for Patent: 4,585,597

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
France82 10425Jun 15, 1982

International Patent Family for Patent: 4,585,597

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Spain532765► Subscribe
Switzerland658451► Subscribe
Germany3321679► Subscribe
Belgium897051► Subscribe
Canada1204779► Subscribe
Spain523233► Subscribe
Spain8407461► Subscribe
Spain532106► Subscribe
Australia1576583► Subscribe
Spain8505632► 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:

US Army
Argus Health
Boehringer Ingelheim
Daiichi Sankyo

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