Peptide process
CA 2069654 C · Owner: Astrazeneca Uk Limited · Inventors: Hayward, Christopher F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the solid phase synthesis of peptides containing an aza-amino acid, for example the decapeptide goserelin which, comprises, (i) assembling all the amino acids of the peptide except the C-terminal aza-amino acid by conventional solid phase synthesis;, (ii) cleaving the peptide from the support with hydrazine or a substituted hydrazine; and, (iii) reacting the hydrazide thus released with a cyanate ion.
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 May 27, 1992 and granted July 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2014.
- 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.