Pharmaceutical composition containing xanthine
CA 1069439 A · Owner: Hoechst Aktiengesellschaft · Inventors: Muller, Roland; Gleixner, Klaus; Lehrach, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmaceutical compositions, A b s t r a c t A pharmaceutical composition for oral administration in dosage unit form which comprises at least one xanthine derivative selected from, a) (w-1)-hydroxyalkyl-dialkylxanthines wherein the (w-1)-hydroxyalkyl group contains 5 or 6 carbon atoms and is in the 1- or 7-position, the alkyl group in the other of the 1- and 7-position contains from 1 to 12 carbon atoms and the alkyl group in the 3-position contains from 1 to 4 carbon atoms, b) (w-1)-oxoalkyl-dimethylxanthines wherein the (w-1)oxoalkyl group contains 5 or 6 carbon atoms and is in the 1- or 7-position and, c) dimethylxanthine derivatives having an additional alkyl group containing from 4 to …
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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.