Aminostilbazole derivative and medicine
CA 2187214 C · Owner: Matsuura, Akira · Inventors: Matsuura, Akira; Hidaka, Hiroyoshi; Matsuda, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
_.. -, ABSTRACT, The invention relates to an aminostilbazole derivative of the following formula or a hydrate thereof and a salt thereof. wherein R1 and R2 each represents hydrogen etc.; R3 R4, R13, and, R14 each represents hydrogen C1-3 acyl, halogen, hydroxy etc.;, R5 represents hydrogen or hydroxy-substituted C1-3 alkyl etc.; R6 represents benzenesulfonyl substituted by C1-3 alkoxy etc.; ring Y represents phenyl etc.; ring Z represents 4-pyridyl its oxide etc. The compound is useful for the treatment of various malignant tumors.
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 April 5, 1995 and granted March 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 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
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.