Bis-bibenzimidazole composition
CA 2062035 A1 · Owner: Thorp, Derek · Inventors: Dalton, Raymond Frederick; Quan, Peter Michael; Thorp, Derek
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bis-bibenzimiazole Composition A composition of bibenzimidazoles of the Formula (I): (I), wherein, X & Y which may be the same or different and taken together, contain a total of from 12 to 52 saturated carbon atoms are (a) each selected from -R, -COR, -CH2COOr -CH(COOR)2, and -COOR; or (b) together form a group selected from and , wherein, R is an optionally substituted hydrocarbyl group A & B taken together with the two carbon atoms to which they are linked form an optionally substituted benzene ring; and C & D taken together with the teo carbon atoms to which they are linked form an optionally substituted benzene ring; characterised in that at least 50% by weight of the bibenzimidazoles …
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 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 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.