Olefin polymer compositions containing silicone additives and the use thereof in the production of film material
CA 1269781 C · Owner: Union Carbide Corporation · Inventors: Foster, George Norris; Metzler, Richard Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Olefin polymer compositions containing silicone additives which can be extruded through relatively narrow die gaps at commercial extrusion rates to provide film material characterized by improved mechanical and optical properties. The silicone additives have the formula: wherein each R, which can be the same or different are, alkyl radicals, R1 is a monovalent organic radical containing at least one ethyleneoxide group, vicinal epoxy group or amino group and x and y, which can be the same or different each have a value of at least one.
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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 May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
- 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.