Stabilized chlorine-containing polymer compositions
CA 2026899 A1 · Owner: Witco Vinyl Additives Gmbh · Inventors: Wirth, Hermann O.; Hartmann, Olaf-Rene; Sander, Hans J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A-17782/=/CGM 353, Stabilized chlorine-containing polymer compositions Abstract of the disclosure, Stabilized chlorine-containing polymer compositions containing a chlorine-containing, polymer and a stabilizer mixture containing:, a) at least one cyclic or acyclic sterically hindered amine b) at least one organic zinc compound and/or inorganic zinc compound from the series comprising carbonates, chlorides, sulfates oxides, hydroxides, basic oxides and mixed oxides, and, c) at least one compound from the series of hydrotalcites and if desired, d) at least one 1,3-diketone and/or e) at least one organic or inorganic calcium compound. Polymer compositions of this type are preferably used for …
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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 4, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2012.
- 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.