Extrusion method and apparatus for producing a cable
CA 2459907 C · Owner: Pirelli & C. S.P.A. · Inventors: Balconi, Luca; Belli, Sergio; Veggetti, Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extrusion method and apparatus for producing a cable including at least one core , comprising at least one transmissive element and at least one pair of coating , layers arranged at a radially outer position with respect of the core are described. The , method of the invention includes the simultaneous steps of depositing by coextrusion , at least one coating layer of polymeric material and one coating layer of expanded , polymeric material and of maintaining a residual pressure not greater than the external , pressure in a substantially annular interspace defined between the coating layers. , With respect to the methods of the prior art the present invention allows to , avoid the …
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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 3, 2002 and granted October 23, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 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
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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.