Novel urea oligomers, the preparation method thereof and pharmaceutical compositions containing same
CA 2462675 C · Owner: Guichard, Gilles Francois Roger · Inventors: Semetey, Vincent; Briand, Jean-Paul; Neuberg, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of compounds having general formula X-(A)¿n?-Y wherein: n varies between 6 and 20; X denotes a hydrogen atom an R¿a?CO, R¿a?OCO, R¿a?NHCO or R¿a?SO¿2? group R¿a? being an alkyl, alkenyl, alkynyl, aryl aralkyl, heteroaryl group, said groups being substituted or not on condition that X is different from H when n is equal to 6; A denotes either a group having formula (I) or (II) wherein R?i¿ is a hydrogen atom, an amino acid side chain an alkyl, alkenyl, alkynyl, aryl, aralkyl or heteroaryl group said groups being substituted or not, i being an integer of between 1 and n; Y is an NR¿b?R¿c? R¿b? and R¿c? group having the same meaning as given earlier for R¿a?. …
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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 2, 2002 and granted August 27, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2024.
- 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.