Blends of polypropylene and sheet structures made from the blends
CA 1325690 C · Owner: Kim, Yong Joo · Inventors: Kim, Yong Joo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention pertains to blends of a first component of a polypropylene polymer with a second component of an ethylene based copolymer. The ethylenebased copolymer has an ethylene copolymerized with moieties of a second molecule where the second molecule is selected from the group consisting of propylene and butene-1. The blends are useful in making single and multiple layer packaging structures. The invention further contemplates packages made from the packaging structures incorporating layers of the blends therein.
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 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 2010.
- 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.