Polyethers containing hindered amine side chains as stabilizers
CA 2127729 A1 · Owner: Novartis Ag · Inventors: Steinmann, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyethers containing hindered amine side chains as stabilizers The invention relates to polyethers of the formula I (I), in which m is 0 or 1; n is an integer in the range from 3 to 100; R1 in the case where m is, 0 or 1, is C1-C36alkyl or C7-C36aralkyl each of which is unsubstituted or substituted by C5-C8cycloalkyl, is interrupted in the aliphatic part by C5-C8cycloalkylene or by oxygen or sulfur or -NR11- or is substituted in the aromatic part by 1 to 3 C1-C4alkyl and/or C1-C4alkoxy radicals; C3-C36alkenyl; C5-C12cycloalkyl which is unsubstituted or substituted by 1 to 4 C1-C4alkyl and/or C1-C4alkoxy radicals; C6-C10aryl which is unsubstituted or substituted by 1 to 4 C1-C4alkyl and/or …
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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 July 11, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2016.
- 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.