Expired Canadian patentCanada
Novel cytotoxic cyclic depsipeptides from the tunicate trididemnum solidum
CA 2012867 C · Owner: Stroh, Justin G. · Inventors: Sakai, Ryuichi; Stroh, Justin G.; Rinehart, Kenneth L. Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel didemnin compounds named didemnin X and didemnin Y have been isolated from the Caribbean tunicate Trididemnum solidum. These compounds have cytotoxic activity and, therefore are useful as antitumor , drugs.
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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 March 22, 1990 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.
FiledMarch 22, 1990
GrantedSeptember 21, 1999
Term endedMarch 22, 2010
Patent numberCA 2012867 C
Classification (IPC)C07K11/02 +2 more
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.