Novel physiologically active peptide and calcium metabolism-regulating agent comprising said peptide as effective ingredient
CA 2030795 C · Owner: Tsumura & Co. · Inventors: Orlowski, Ronald C.; Waki, Yoshihiro; Hanamura, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel physiologically active peptide having the following amino acid sequence:, (see above formula) wherein X1 stands for Ser-Thr or Thr-Ser; X2 stands for Met, Gly, Ala, Val, n-Val Pro, Leu or n-Leu;, X3 stands for Glu; X4 stands for Leu-Gln-Thr, Gln-Thr, Leu or Gly-Gln-Thr;, X5 stands for Val-Gly-Ala or Ser-Gly-Thr; R stands for H, NH2, N-acyl or N-alkyl; X6 stands for CO-NH or NH-CO;, X7 stands for an amino acid sequence at the 2- to 6-positions of native calcitonin and having 0 to 6, amino acids, X8 stands for an amino acid sequence at the 8- to 32-positions of native calcitonin; and each of n1 and n2 is an integer of 0 to 19 and n1 + n2 is 1 to 20, or a pharmacologically acceptable …
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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 April 19, 1990 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 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
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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.