Process and device for building a tunnel immersed on a sub-sea soil
CA 2566733 C · Owner: Longchamp, Pierre · Inventors: Autuori, Philippe; Palbras, Patrick; Longchamp, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The tunnel is built in successive sections by means of a machine M suitable for operating at the surface and in immersion that is displaced in the water on the sub-sea soil this machine comprising a fluid-tight working space (6) for accommodating the personnel and equipment required for construction, this space having a rearward-facing opening for building and erecting a section at the rear of the machine and the machine comprising in its forward section a ballastable chamber (7) equipped with means (21-23) for preparing and grading the soil in readiness for erection of a section.
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 May 11, 2005 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.