Methods for the manufacture of loratadine, intermediates useful in the manufacture thereof
CA 2134128 A1 · Owner: Jackson, William Paul · Inventors: Lee, Sue; Iyer, Rajeshwari; Jackson, William Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel process for the manufacture of loratadine together with the novel intermediates obtained during the synthesis of loratadine are described. Loratadine is obtained by intramolecular cyclisation of 4-{3-2-(2-bromo-5chlorophenyl)ethyl-pyridine-2-ylmethylene}piperidine-1-carboxylic acidethyl ester in the presence of a palladium catalyseur and a base.
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 October 24, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 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
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.