Expired Canadian patentCanada
Periplanone a, its preparation and its use for controlling cockroaches
CA 1286686 C · Owner: Krieg, Wolfgang · Inventors: Neudert, Reinhard; Hofmeister, Peter; Krieg, Wolfgang
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Synthetically prepared periplanone A of the formula I, (I), its preparation and its use for controlling cockroaches.
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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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 9, 1987
GrantedJuly 23, 1991
Term endedJuly 23, 2008
Patent numberCA 1286686 C
Classification (IPC)C07D303/32 +1 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.