Preparation of a new diosmine derivative
CA 1318317 C · Owner: Fabrica Espanola De Productos Quimicos Y Farmaceuticos, S.A. · Inventors: Orjales Venero, Aurelio; Mosquera Pestana, Ramon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention refers to the preparation of diosmine octakis (hydrogen sulfate) aluminium a new, derivative of diosmine, by reaction of diosmine with a sulfating agent, such as sulfur trioxide-pyridine complex sulfur trioxide-trimethylamine complex and sulfur trioxide-triethylamine complex, at a temperature between 40° and 110°C, in an approprlate medium with preference, pyridine, dimethylformamide and dimethylacetamide and, final addition of aluminium hydroxychloride. This product may be used in gastrointestinal diseases.
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
- Granted May 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2010.
- 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.