Preparation of substituted olefins
CA 2298943 A1 · Owner: Basf Aktiengesellschaft · Inventors: Schwab, Peter; Schulz, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
C6 compounds of the formula (I), E-CH2-CH=CH-CH2-E1 (I) are prepared by self metathesis or cross metathesis of compounds of the formulae (II) and/or (III) R-CH=CH-CH2-E (II), R1-CH=CH-CH2-E1 (III) where, E, E1 are independently -CHO, -COOH -COOR2, -C(O)NR3R4, -CN, R, R1 are independently H C1-12-alkyl, C6-12-aryl or C7-13-alkylaryl and R2, R3, R4 are independently H, C1-12-alkyl C7-13-aralkyl, in the presence of a homogeneous catalyst comprising ruthenium compounds or ruthenium complexes.
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 February 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2022.
- 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.