Method for producing toluol derivatives
CA 2473936 A1 · Owner: Bottke, Nils · Inventors: Fischer, Rolf-Hartmuth; Bottke, Nils; Roesch, Markus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing toluol derivatives of formula (I), in which R1, R2, and R3 independently of one another represent hydrogen halogen, C1-C6 alkyl, hydroxyl or C1-C6 alkoxy. Said derivatives are produced by the hydrogenation of benzaldehydes and/or benzylalcohols of formula (II) IIa: X=CHO X=CHOC1-C6 alkyl2, IIb: X=CH2-OH X=CH2OC1-C6 alkyl with hydrogen in the presence of a catalyst, which is defined in more detail in the description.
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 January 20, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2025.
- 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.