Hydroxy-functional polyether laminates
CA 2314243 A1 · Owner: Dow Global Technologies Inc. · Inventors: Stevens, Bradley Day; Fiero, Terry H.; Kelch, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminate structure comprising one or more layers of a metal and one or more layers of a hydroxy-functional polyethers and optionally, one or more layers , of an organic polymer which is not a hydroxy-functional polyether. The laminate structures are useful in the manufacture of containers such as , aerosol containers and beverage containers.
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 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 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.