.alpha.-phenylacrylic acid derivatives, their preparation and their use for cocntrolling pests and harmful fungi
CA 2068017 A1 · Owner: Kardorff, Uwe · Inventors: Kuenast, Christoph; Otter, Rainer; Roehl, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O.Z. 0005/42407, ABSTRACT OF THE DISCLOSURE: .alpha.-Phenylacrylic acid derivatives I I, n = 0 to 4;, y = 0 or 1;, R1 = H; alkyl; alkenyl; alkynyl; substituted or unsubstituted cycloalkyl; vinyl or ethynyl when W is a direct bond; R2 = CN; alkenyl; alkynyl; substituted or unsubstituted cycloalkyl; substituted or unsubstituted alkyl;, R3 = H; NO2; CN; halogen; alkyl; alkoxy; haloalkyl; haloalkoxy; alkylthio; or when n is 2, 3 or 4, two adjacent substituents R3 together form substituted or unsubstituted 1,3-butadien-1,4-diyl; R4 = H; CHO; substituted or unsubstituted alkyl; substituted or unsubstituted alkenyl; substituted or unsubstituted alkynyl; substituted or unsubstituted saturated or …
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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
- Filed May 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2014.
- 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.