Biologically active drug polymer derivatives and method for preparing same
CA 2038935 C · Owner: Debiopharm S.A. · Inventors: Deghenghi, Romano; Orsolini, Piero; Sartore, Luciana
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New biologically active drug polymer derivatives namely peptides or protein derivatives are useful medicaments and are, represented by the generic formula: RO-(CH2-CH2O)n-(CO)-NH-X-(CO)-NH-Z wherein R represents a lower alkyl group n, is an integer comprised between 25 and 250 X when combined with adjacent NH and CO groups represents an amino acid or a dipeptide or tripeptide residue, and Z when combined with the adjacent NH group represents a biologically active peptide or protein or NH or NH2 containing drug residue.
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 26, 1990 and granted December 8, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 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
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.