Cables comprising optical fibres of halide glass
CA 1301508 C · Owner: British Telecommunications Public Limited Company · Inventors: France, Paul W.; Moore, Martin W.; Carter, Steven F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fibre cable for radiation monitoring eg, remote spectroscopy, has the fibres immersed in a water miscible liquid such as ethylene glycol or isopropanol. It has been found that water miscible liquids protect even fluoride fibre against attack by water eg water which, diffuses into the bore of a cable during its useful life.
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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.