Multilayer rotational moulding
CA 2506478 C · Owner: Total Petrochemicals Research Feluy · Inventors: Maziers, Eric; Clay, Bruce; O'Brien, Gregory
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention discloses a multilayer article prepared by rotational moulding that comprises: a) a layer A that is a polyolefin(PO)-based layer prepared from a composition comprising: - from 40 to 100 wt% of polyolefin (PO) or a mixture thereof and - from 60 to 0 wt% of a functionalised polyolefin (FPO) or of a PO grafted to a non-polyolefin (NPO) in the form of a block copolymer (PO)g-NPO); b) a layer B comprising: - a PO that is dissimilar from that of layer A or a NPO or a mixture thereof; - optionally a FPO or a (PO-g-NPO); c) optionally a layer C prepared from a polymer that is dissimilar from that of layer A and that is similar to or dissimilar from that of layer B and is …
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 November 20, 2003 and granted April 28, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2025.
- 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.