Amphiphile nucleosidphosphatanaloga
CA 2129986 C · Owner: Guerin, Frederique · Inventors: Schwendener, Albert Reto; Guerin, Frederique; Schott, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to amphiphilic nucleosidephosphate analogues of Formula I, (See formula I) wherein, R1 stands for a hydroxyl-, aminoacylated, or alkylized amino, group or one substituted by polyoxyethylene whose acyl- or alkyl, rest is linear or branched have 1 to 24 C-atoms and up to 2 double bonds, and which can be substituted by an aromatic radicals R2 stands for H, F, a 2-bromvinyl radical or a linear or branched C1-C24 alkyl radical;, R3 and R4 are identical or different and stand for H hydroxyl, halogen and azido;, R5 is a nucleoside radical of Formula II (See formula II), that is connected through R8 R9, or R10 to the nucleotide of Formula I. R5 can also stand for OH. A …
Read the whole patent
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 February 12, 1993 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2015.
- 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.