Fibre storage
CA 2204047 A1 · Owner: British Telecommunications Public Limited Company · Inventors: Jenkins, Peter David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of installing an optical fibre into a previously installed duct whereby the optical fibre is supplied through a gas tight seal to a blowing apparatus connected to the duct, and a supply of propelling gas connected, to the blowing apparatus between the fibre supply and the duct serves to, entrain the optical fibre and carry it in the propellant gas through the duct. The optical fibre is contained in a container vessel which may also be pressurized.
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 March 23, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 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.