Method of decorating multi-layered plastic tubes
CA 2210317 C · Owner: Silgan Tubes Corporation · Inventors: Kieras, Ronald E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A decorative feature is formed in the side wall of a longitudinally stretched, extruded, thermoplastic tube comprised of at least two different thermoplastic layers by heating a selected portion of an outer layer of the tube to a temperature sufficient to soften and allow displacement of sections of the outer layer without causing substantial deformation of an adhered layer. The heating is by contact with a hot fluid or a heated die and the displacement of the section of the outer layer by contact with a die.
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 July 14, 1997 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2019.
- 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.