Expired Canadian patentCanada
Hdpe/polypropylene film laminates
CA 2079922 C · Owner: Exxonmobil Oil Corporation · Inventors: Lu, Pang-Chia
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a laminate of layer (A) a biaxially oriented high density polyethylene film of which at least 50 wt. % of the polyethylene has a density of 0.960 or greater; and layer (B) a biaxially oriented polypropylene film.
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 October 6, 1992 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 6, 1992
GrantedFebruary 25, 2003
Term endedOctober 6, 2012
Patent numberCA 2079922 C
Classification (IPC)B32B27/08 +2 more
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.