Platinum complexes
CA 1256115 A · Owner: Chugai Seiyaku Kabushiki Kaisha · Inventors: Morikawa, Kazumi; Honda, Masamitsu; Endoh, Kohichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstact of the Disclosure: Novel platinum complexes represented by the formula: (I), wherein A is alkylene having carbon atoms of from 1 to 3; R1, R2, R3 and R4 are the same or different and are hydrogen or alkyl having carbon atoms of from 1 to 4; X and Y are independently a halogen atom, or combined together to form ; and ?, m and n are, independently 0 or 1 with the proviso that when n is 0, X and Y do not simultaneously represent a halogen atom and a process for preparing the same are disclosed. These platinum complexes have high antitumor activity and low toxicity, and are easily soluble in water. Therefore they, are very useful as an antitumor agent.
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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
- Granted June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.