Eslatomeric thermoplastic copolyether-esters endowed with improved thermo-oxidation resistance
CA 2033413 C · Owner: Stella, Romolo · Inventors: Chiolle, Antonio; Stella, Romolo; Maltoni, Gian Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The thermo-oxidation resistance of the elasto= meric thermoplastic copolyether-esters is remarkably improved by the addition of a synergistic mixture con= sisting of an organo phosphite and a pentaerythritol phosphite. The capolyether-esters thus compounded find use in the extrusion, blow and injection molding technolo= gies.
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 December 28, 1990 and granted April 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 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
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.