Coated hdpe film and its method of manufacture
CA 2175706 C · Owner: O'Brien, Jeffrey James · Inventors: O'Brien, Jeffrey James; Liu, Leland Li-Jen; Sheppard, Robert Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a coated film composition comprising: a) a biaxially oriented high density polyethylene (HDPE) film comprising at least 50 wt. % of HDPE having a density of 0.960 or greater und b) a coating which is derived from the group consisting of polyvinylidene chloride polymer or copolymer acrylic acid polymer or copolymer, and polyvinyl alcohol polymer (PVOH); amd its method of manufacture.
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 1, 1994 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 2016.
- 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.