Crosslinked, heat shrinkable polypropylene compositions
CA 2323307 A1 · Owner: Heydrich, Marcus P.W. · Inventors: Jackson, Peter; Heydrich, Marcus P.W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat-shrinkable article suitable for use as an insulating or coating material comprises a, crosslinked composition of a polypropylene homopolymer or copolymer and an ethylene-propylene, elastomer. The article is formed by a process comprising: i) creating a blend of the polypropylene, homopolymer or copolymer and the ethylene-propylene elastomer by melt mixing; ii) melt, processing the blend produced in i) to produce a melt processed material; iii) crosslinking the melt, processed material produced in ii) by exposing it to radiation to produce a crosslinked material; iv), stretching the crosslinked material at a first temperature close to or above its softening or melting, point …
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 October 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2022.
- 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.