.delta.-BUTYROLACTAMS, PHARMACOLOGICALLY ACTIVE COMPOSITIONS THEREOF, PROCESSES FOR THE PREPARATION THEREOF AND THEIR MEDICAL USE
CA 1262250 C · Owner: Liu, Geng-Tao · Inventors: Liu, Geng-Tao; Benz, Ulrich; Chen, Yan-Rong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Purified Clausenamide of the formula "Clausenamide", is obtained by extraction of leaves of Clausena lansium followed by purification, Reduction products ethers, etc. can be produced. The compounds are effective in treating hypoxia and amnesia.
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 October 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 10, 2006.
- 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.