3-aryloxazolidinone derivatives, process for their preparation and their use in therapy
CA 2027783 C · Owner: Sanofi-Aventis · Inventors: Koenig, Jean-Jacques; Schoofs, Alain; Rovei, Vincenzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The derivatives of the formula :, (I), wherein : - R1 is H or C1-C4 alkyl ;, - X is either an oxygen atom in which case R2 = H or, halogen, or a methylene group or a -CH=CH- group in, which case R2 = H ;, - n is 1 or 2 when X is an oxygen atom or a methylene group and 0 or 1 when X is a -CH=CH- group ; - each of R3 and R4 is independently H C1-C4 alkyl, C4-C7, cycloalkyl, phenyl or benzyl ; - R5 is H or C1-C4 alkyl ;, - R6 is C1-C4 alkyl CHF2, CF3, CF3CF2, C4-C7 cycloalkyl, phenyl or benzyl ; - R5 and R6 may further form together a -(CH2)3- or -(CH2)5- chain ;, - R5 and R6 may further form together a -(CH2)4- or -(CH2)5- chain ; and, - R7 is H, C1-C4 alkyl C2-C5 acyl or benzyl, useful as …
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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 October 16, 1990 and granted April 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 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
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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.