Sulfonated multilayer container and a method for producing the same
CA 2071813 A1 · Owner: Takado, Yutaka · Inventors: Takado, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a multilayer container having good gasoline barrier properties which is suitable for use as the automotive fuel tank, and also to a method for producing the same. More particularly the present invention relates to a sulfonated multilayer container having an interlayer of highly sulfonated high-density polyethylene, and also to a method of producing the same.
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 13, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.