Mercaptobenzoates as stabilisers for chlorine-containing polymers
CA 2000925 C · Owner: Ciba-Geigy Ag · Inventors: Wehner, Wolfgang; Abeler, Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition containing a) a chlorine-containing polymer b) at least, one Me(II) carboxylate and/or Me(II) phenolate wherein Me(II) represents, Ba, Ca, Mg, Cd Sr or Zn, and c) at least one compound of formula I (see formula I), wherein n is 1, 2, 3, 4 or 6 and when n is 1, X is C1-C20alkyl, C3-C20-alkenyl C5-C12cycloalkyl, C5-C12cycloalkyl substituted by C1-C4alkyl phenyl, C7-C9phenylalkyl, phenyl substituted by from 1 to 3 radicals or C7-C9phenylalkyl substituted on the phenyl ring by from 1 to 3 radicals the radicals being selected from the group consisting of C1-C4alkyl chlorine, hydroxy, methoxy and ethoxy; when n is 2 X is C2-C12alkylene, C2-C12alkylene substituted by phenyl 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 October 18, 1989 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2011.
- 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.