Winding tube
CA 2405663 A1 · Owner: Sonoco Development, Inc. · Inventors: Quick, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A winding tube for web material includes an elongated hollow cylindrical, tube body and at least one hollow cylindrical adapter. The adapter contacts a casing surface, of the tube body substantially over the entire circumference along an axial portion of the tube, body to fix the adapter against relative rotation. The adapter has an exterior diameter that, dues not exceed that of the tube body. The adapter is removable from the tube body without, the adapter being destroyed.
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 September 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 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.