Acetylene derivatives, their preparation and their use for controlling insects and acaridae
CA 2048159 A1 · Owner: Basf Aktiengesellschaft · Inventors: Rentzea, Costin; Theobald, Hans; Kuekenhoehner, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
27 - O.Z. 0050/41792, Abstract of the Disclosure: Acetylene derivatives of the formula I, R1-C=C-R2 I, where R1 is an unsubstituted or substituted five-membered heteroaromatic structure and R2 is an unsubstituted or substituted mononuclear to trinuclear aromatic ring system, their preparation, insecticides and acaricides containing them and methods for their use.
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 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2013.
- 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.