Erucyl, brassidyl and nervonyl derivatives
CA 2065104 C · Owner: Eibl, Hansjorg · Inventors: Eibl, Hansjorg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New erucyl, brassidyl and nervonyl derivatives The present invention provides compounds of the general formula:-, (see formula I), wherein R is a erucyl brassidyl or nervonyl radical, R1, R2 and R3 are independently of one mother, straight-chained branched or cyclic saturated or, unsaturated alkyl radicals containing up to 4 carbon atoms, which can also contain a hydroxyl group and, wherein two of these radicals can also be connected to form airing, A is a valency bond or a radical of one of the formulae:, (see formula II, III IV), -CH-CH-CH2-O- (see formula VI) or (CH2-CH2-Owhereby the radicals (II) to (VII) have an orientation such that the oxygen atom is attached to the phosphorus atom …
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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 April 3, 1992 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 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.