Novel peptides, and antidementia agents containing the same
CA 2014590 C · Owner: Hirate, Kenji · Inventors: Isowa, Yoshikazu; Masaki, Mitsuo; Sato, Yoshiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a novel peptide having one of the formulae: (A and B are the amino acids: wherein, if A is D- or L-Pro B is Har or Cit;, if A is D-Pro, B is D-Arg and, if B is D- or L-Arg, A is Sar, Pip Aze or Arg), Asn-A-L-(D-)Pro-Arg-(Gly)n (A is Ser Thr or Ala, n, is 1 or 0), A-Ser-Pip-Arg (A is Pro-Asn- Asn- or Pro-), (A is cyclopentylcarbonyl Pro or, pGlu; B is Gly or .beta.-Ala, W is a hydrogen atom or a group having the formula: , or a peptide having the formula: wherein A and B hare the same meanings as mentioned above, respectively, pGlu-Asn-Ser-A-B-(Gly)n (A is Aze D- or L-Pro, Pip, or Sar, B is D- or L-Arg Cit, Har, Lys or Orn, n is 1, or 0) and Pro-(Asn)m-Ser-L-(D-)Pro-Arg-(Gly)n …
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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 12, 1990 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.