Extrudable blends of polyethylene and films thereof
CA 1293077 C · Owner: Mobil Oil Corporation · Inventors: Shaw, Richard G.; Chu, Shaw C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C4 to C10 olefins (LLDPE) into thin films is improved by adding small amounts e.g. 0.02 to 2, weight percent polyvinylidene fluoride to reduce melt fracture head, pressure and to obtain films having excellent anti-blocking characteristics.
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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 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.