Communications cable
CA 2395583 A1 · Owner: Plastic Insulated Cables Limited · Inventors: Hudson, Martin Frederick Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a communications cable comprising a plurality of cores (4) through which communications signals can be transmitted each core , comprising a metallic conductor (6) surrounded by a close-fitting sleeve (8) of insulating material which is substantially free of halogenated polymers the insulating material having a permittivity of no greater than 3 and , comprising an outer layer (8''') of a non-foamed polymer surrounding a layer (8'') of foamed polymer, the outer layer (8''') containing a fire retardant the layer of foamed polymer optionally surrounding a layer (8') of non-foamed polymer, and wherein the region of the insulating material immediately adjacent the …
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 December 22, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2022.
- 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.