Optical fibre communications cable
CA 1046319 A · Owner: Pirelli General Cable Works Limited · Inventors: Osterfield, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fibres communications cable comprises one or more core elements and protective layers, including armouring layers and an outer plastics sheath, disposed around the core element or elements. Each core element comprises a plurality of optical fibres laid up around an elongate member of relatively high tensile strength for example a cord comprising, glass fibres stranded together. A cushioning layer is disposed around the optical fibres and a second cushioning layer is disposed between the elongate member and the optical fibres : these cushioning layers for example, comprising extruded cellular plastics cushion the optical fibres against, cross-sectional distortion during …
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
- Granted January 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 1996.
- 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.