Modular block retaining wall system and method of constructing same
CA 2189538 C · Owner: Miller, Robert A. · Inventors: Taylor, Philip M.; Miller, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modular wall block (10) is formed with n recess (32) in a top surface to receive fingers of a rake-like grid connection device (74). The fingers pass through apertures of a grid-like sheet of reinforcing material (44) which extends rearward to reinforce earth fill (75) behind a retaining wall (80) formed from such blocks. The rake may include a spine with tabs (120) projecting upwardly to engage a slot (102) in the bottom of a higher wall block to position the blocks. Slat members (56) are received in grooves (52) on the block sides to project upward and to the sides to engage and position adjacent blocks.
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 22, 1995 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2017.
- 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.