Multi-layer elastic sleeves for electric power cable joints and joints therewith
CA 2007738 C · Owner: Pirelli Cavi S.P.A. · Inventors: Vallauri, Ubaldo; Parmigiani, Bruno; Portas, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric covering for a joint between a pair of electric cables, a device including such covering in elastically expanded condition on a rigid tubular support and electric cable joints including such covering. The covering includes at least two elastic sleeves of cross-linked polymeric material a first, radially inner sleeve at least partly of insulating material and a second radially outward sleeve. To permit the covering to be elastically expanded and encircling the rigid support for a long period of time, e.g. two years, the two sleeves have different mechanical properties and in particular the material of the, second sleeve has a residual deformation which is applied by, elongation …
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 January 15, 1990 and granted April 23, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2012.
- 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.