Process for introducing an optical cable into solid ground
CA 2598693 C · Owner: Kossat, Rainer · Inventors: Kossat, Rainer; Zeidler, Guenter; Kunze, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a fiber optic cable installation structure comprising: a surface defining a cut channel having a width of about 12 mm or less; a fiber optic communication cable disposed within the channel said fiber optic communication cable comprising a tube sized to fit within the channel and at least one optical waveguide disposed within said tube; and a filling material overlying said fiber optic communication cable and at least partially filling the channel said filling material at least partially comprised of material not previously evacuated to form 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 November 12, 1996 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2018.
- 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.