Ester of an oxidized polyethylene wax and its use as lubricant in plastic molding compositions
CA 2060772 A1 · Owner: Hohner, Gerd · Inventors: Hohner, Gerd; Piesold, Jan-Peter; Lukasch, Anton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Ester of an oxidized polyethylene wax and its use as lubricant in plastic molding compositions An ester obtained from an oxidized polyethylene wax and a monofunctional C1- to C8-alkanol displays a very good release action as a lubricant in thermoplastic molding compositions, in particular based on vinyl chloride polymers. In addition, it does not reduce the transparency, in particular in the case of calender films.
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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 February 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 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.