Extrusion compositions having high drawdown and substantially reduced neck-in
CA 2205116 C · Owner: Kelley, David C. · Inventors: Parikh, Deepak R.; Jain, Pradeep; Baker, Sharon L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ethylene polymer extrusion composition having high drawdown and substantially reduced neck-in, a process for making such a composition and a process of using such a composition to prepare extrusion coatings extrusion , profiles and extrusion cast films are disclosed. The ethylene polymer extrusion composition is made of 75-95 weight percent of at least one ethylene .alpha.-olefin interpolymer and 5-25 weight percent of at least one high pressure ethylene polymer characterized as having high melt strength and a broad, bimodal molecular weight distribution. In profiles coatings or films, the composition can be used as sealant adhesive or abuse resistance layers.
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 13, 1995 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2017.
- 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.