Process for introducing an optical or electrical cable into solid ground, and machine for laying the cable
CA 2229891 A1 · Owner: Finzel, Lothar · Inventors: Diermeier, Heinz; Dotzer, Peter; Finzel, Lothar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for introducing a cable, in particular a microcable, into solid ground, a channel-forming unit being used to produce a channel in the heated top course of the solid ground by virtue of displacing ground material. Once the cable has been introduced, this channel is refilled with the ground material displaced during production of the channel.
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 February 18, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2020.
- 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.