New 2,9-dioxatricyclo4,3,1,0 su3,7 xx decane derivatives, process for their preparation and pharmaceutical compositions thereof
CA 1098528 A · Owner: Kali-Chemie Pharma G.M.B.H. · Inventors: Asai, Akiji; Thies, Peter W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New 2,9-dioxatricyclo4,3,1,O3,7) decane derivatives are disclosed which are substituted by an amino methyl group in the C3 position, and which exhibit sedative especially sleep improving properties, and which have the formula, (I), wherein R1 represents an amino group one of R2 and R3 is hydrogen and the other represents hydroxy acyloxy or carbamyloxy or R2 and R3 jointly represent oxygen, one of R4 and R5 is hydrogen and the other represents alkyloxy or aralkyloxy, y and y' each represent hydrogen or jointly form a bond and their pharmacologically acceptable salts as well as, pharmaceutical formulations thereof.
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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
- 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.