Improved heat shrinkable polyolefin film
CA 2032272 C · Owner: E. I. Du Pont De Nemours And Company · Inventors: Snyder, John Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Linear low density copolymer of, ethylene/1-hexene is made processible into heat shrinkable film by a continuous process starting with extrusion of the copolymer as a film and the production rate of heat shrinkable film made from linear low density copolymer of ethylene/1-octene can be increased by the step of blending a minor proportion of highly branched low density polyethylene with either copolymer prior to extrusion.
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 December 14, 1990 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2012.
- 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.