Cancer metastasis inhibitor containing a streptococcus agalactiae ia type or ib type surface polysaccharide as a main ingredient
CA 2213775 C · Owner: Kawase, Mitsuo · Inventors: Iijima, Shinji; Yoshida, Yasuko; Miyake, Katsuhide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the technology for inhibiting the cancer metastasis, and is aimed at the provision of a pharmaceutical composition for effectively inhibiting the metastasis of the cancer. A cancer metastasis inhibitor according to the present invention is characterized by containing a sugar chain separated from a surface of a Streptococcus agalactiae Ia type or Ib type as a main ingredient. Since the surface sugar chains of the Streptococcus agalactiae Ia type or Ib type have structures similar to surface sugar chains of the cancer cells, the former surface sugar chains adhere to E-selectin appearing in an intravascular endothelial cell, competitively inhibit the adhesion …
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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 December 27, 1995 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2017.
- 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.