Polyamine derivatives as radioprotective agents
CA 2219050 C · Owner: Merrell Dow Pharmaceuticals Inc. · Inventors: Snyder, Ronald D.; Edwards, Michael L.
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 polyamine derivatives of RHN-(CH2)m-NH-(CH2)n-NHR wherein m is an integer from 2 to 4, n is an integer from 3 to 10 and R is C2-C6 alkyl or -(CH2)p-Ar wherein Ar is phenyl or naphthyl and p is an integer from 0 to 2; and the pharmaceutically acceptable addition salts thereof which are useful as radioprotective agents. It relates also to the use of polyamines of the formula, RHN-(CH2)m-NH-(CH2)n-NH-(CH2)m-NHR wherein m is an integer from 2 to 4, n is an integer from 3 to 10 and R is C2-C6 alkyl or -(CH2)p-Ar wherein Ar is phenyl or naphthyl and p is an integer from 0 to 2; and the pharmaceutically acceptable addition salts thereof as radioprotective agents.
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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 January 31, 1994 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2016.
- 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.