Butene-rich butene-1 propylene copolymer compostion
CA 1279422 C · Owner: Shell Oil Company · Inventors: Hwo, Charles Chiu-Hsiung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
K-4903 (US), JRD:kn, BUTENE-RICH BUTENE-1 PROPYLENE COPOLYMER COMPOSTION Abstract of the Invention, A blend for producing a heat shrinkable oriented thermoplastic film which has good clarity and good processability comprising a mixture, containing:, from about 10% by weight to about 60% by weight butene-1 propylene copolymer, where the propylene comonomer content of said butene-1 propylene copolymer is from about 5 m% to about 40 m%; and from about 40% by weight to about 90% by weight propylene homopolymer or copolymer. BKAD8529701
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
- Granted January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.