Intermediate used for the preparation of deferoxamine
CA 2083149 C · Owner: Wuts, Peter G. M. · Inventors: Wuts, Peter G. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing deferoxamine and a composition of formula (I): X-Ph-CH2- O-C(O)-NH-(CH2)4-CH = NOR, wherein X is a C1-C4 alkyl -O(C1-C4 alkyl), a halogen or hydrogen; R is X-Ph- CH2- or hydrogen for preparing deferoxamine. In one embodiment X and R are hydrogen. The intermediate formula (I) has the advantage of being prepared in fewer and more efficient steps from readily available materials than conventional means for preparing deferoxamine.
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 June 25, 1991 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2013.
- 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.