Polyethylene film composition
CA 2343375 A1 · Owner: Buhler-Vidal, Jorge Oscar · Inventors: Michie, William James Jr.; Buhler-Vidal, Jorge Oscar; Ealer, George Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An in situ blend comprising a mixture of first and second ethylene/alphaolefin copolymers wherein the alpha-olefin has 3 to 8 carbon atoms the first , copolymer having a density in the range of 0.9035 to 0.908 gram per cubic centimeter and a roll-milled flow index in the range of about 1.4 to about 2.6 grams per 10 minutes and the second copolymer having a density in the range of 0.925 to 0.945 gram per cubic centimeter and a melt index in the range of about 200 to about 400 grams per 10 minutes; the weight ratio of the first copolymer to the second copolymer being in the range of about 45:55 to about 60:40 and the in situ blend having a density in the range of 0.919 to 0.924 gram …
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 September 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2020.
- 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.