Biphenylylethanes
CA 2026112 A1 · Owner: Plach, Herbert · Inventors: Plach, Herbert; Poetsch, Eike; Wachtler, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Biphenylylethanes of the formula I R1-CH2-X-(CH2CH2)m-Ph-Ph-CH2CH2-Ph-Y-CH2-R2 I in which, R1 and R2 are each, independently of one another alkyl, alkenyl or oxaalkyl having up to 12 C atoms and one of the radicals R1 and R2 is alternatively H, m is 0 or 1, X and Y are each independently of one another, O, S, CO-O O-CO, O-CO-O or a single bond, the, radical X is alternatively 1,4-phenylene or trans-1,4-cyclohexylene, and the radical Y is alternatively trans-1,4-cyclohexylene, and Ph is 1,4-phenylene, and one or two of the radicals Ph is alternatively 2- or 3-fluoro-1,4phenylene, with the proviso that, in the case (a) where X = 1,4phenylene and m = 1, one or two of the radicals Ph …
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 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2012.
- 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.