Urethane derivative, their preparation and their applications as hydrating agents in cosmetic or pharmaceutical compositions for the treatment of dry skin
CA 2020923 C · Owner: De Rigal, Jean · Inventors: Sebag, Henri; De Rigal, Jean; Philippe, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
General formula urethane derivatives (see Figure 1) in which R represents a CH2OH -CHOH-CH3 or (CH2)3-NH-CO-NHY grouping where Y represents -H or COOR', R' representing a linear or branched alkyl group possibly non-saturated, with 8 to 24 carbon atoms or a monocyclic cycloalkyl group replaced by an alkyl with a total number of carbon atoms of 10 or more as well as the salts of the formula I compounds and mixtures of formula I compounds and/or their salts; their preparation and application particularly as moisturizing agents in cosmetic or pharmaceutical mixtures used to treat dry skin.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 11, 1990 and granted July 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.