Improved aluminium foil rolling method
CA 2438703 A1 · Owner: Alcan International Limited · Inventors: Miller, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aluminium foil rolling method comprising the steps of taking two strips of aluminium, bringing facing surfaces of the two strips into contact with one another and subjecting the two strips to a first pack rolling operation thence subjecting the same two strips to a second pack rolling operation whilst maintaining the two strips in substantially the same registry as when the first pack rolling operation was carried out. Advantageously following , the first pack rolling operation the two strips are coiled together onto a common coil in order to assist in maintaining their registry for the second pack rolling operation. In an embodiment a release material is applied to the , facing …
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 February 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2024.
- 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.