Canadian application, no grantCanada
Naphthofuran derivatives
CA 2128654 A1 · Owner: Naegeli, Peter · Inventors: Naegeli, Peter
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel naphthofuran derivatives of the formula I, wherein R represents hydrogen, methyl or ethyl. The compounds of formula I are valuable (amber) odorants and also flavourants.
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 July 22, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 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.
FiledJuly 22, 1994
GrantedNo grant recorded
Term endedJuly 22, 2014
Patent numberCA 2128654 A1
Classification (IPC)C07D307/92 +2 more
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.