Stabiliser system for the stabilisation of halogenated polymers
CA 2523538 C · Owner: Hopfmann, Thomas · Inventors: Friedrich, Hans-Helmut; Kuhn, Karl-Josef; Hopfmann, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a mixture of stabilisers for the stabilisation of chlorinated , polymers, comprising at least a) a sulphate ester salt and/or a sulphonate salt of formula , (I): R(O)sSO3tM and b) an alkanolamine of formula (II) where M = alkali, earth alkali, lanthanide (Cer) or aluminium cation t = metal cation valence of 1, 2 or 3; s = 0 or 1, R = , C1-C22 alkyl, phenyl, C7-C10 phenylalkyl C7-C24 alkylphenyl, x = 1, 2 or 3; y , = 1 2, 3, 4, 5 or 6; n = 1 - 10; R1,R2 independently = H C1-C22 alkyl, --(CHR3a)y-, CHR3b-O-n-H --(CHR3a)y-CHR3b-O-n-CO-R4, C2-C20 alkenyl C2-C18 acyl, C4-C8 , cycloalkyl, optionally substituted at the .beta.-position by OH C6-C10 aryl, C7-C10 alkaryl , …
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 April 2, 2004 and granted May 29, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2026.
- 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.