Process for producing nucleoside derivatives
CA 2244314 A1 · Owner: Mitsuda, Satoshi · Inventors: Ishii, Takeshi; Sugai, Takeshi; Ohta, Hiromichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a process for producing a nucleoside derivative of the formula I: (see fig. I), characterized by contacting 2',3',5'-O-triacylribonucleoside derivative of the formula II: (see fig. II), with an ester hydrolase: (i) capable of regio-selectively deacylating the acyl group at 5'-O-position in the formula II above and, (ii) having an amino acid sequence encoded by a gene which hybridizes to a nucleotide sequence encoding an amino acid sequence of SEQ ID NO: 1
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 July 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 2020.
- 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.