Embankment reinforcing structures
CA 2017578 C · Owner: Risi, Antonio · Inventors: Risi, Angelo; Risi, Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to improvements in the control and stabilization of earthen or soil embankments comprising a gravity facing wall tied to and anchored by a grid or mesh extending into the embankment. The gravity facing wall is comprised of facing wall units or blocks stacked in overlapping horizontal courses. In particular an improved facing wall unit or block is provided featuring a projection formation extending longitudinally of the block in the upper surface and, in the lower surface an offset, recess of matching extent and configuration to the projection formation. The projection formation further includes grid or mesh engaging projections which penetrate the mesh or grid when …
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 25, 1990 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 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.