Compositions containing n-heterocyclic phosphonates which contain 6 ring members
CA 2076163 A1 · Owner: Novartis Ag · Inventors: Nesvadba, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions containing N-heterocyclic phosphonates which contain 6 ring members There are disclosed compositions comprising: A) an organic material which is susceptible to thermal, oxidative and/or light-induced degradation and B)at least one compound of, formula I and/or II (I) , (II), wherein R0 is hydrogen, C1-C12alkyl C5-C12cycloalkyl, C2-C12alkenyl, phenyl-C1-C4alkyl -CO-R5 or -CO-OR5, R1 is hydrogen, methyl ethyl or R1 together, with R2 are ,R2 is hydrogen methyl, ethyl or R2 together with R1 are R3 is hydrogen, methyl, ethyl or R3 together with R4 are R4 is, hydrogen, methyl, ethyl or R4 together with R3 are R5 is C1-C18alkyl, C5-C12cycloalkyl, phenyl-C1-C4alkyl or phenyl R6 and …
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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 August 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 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
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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.