Interlocking masonry wall block
CA 2355010 A1 · Owner: Whitson, Robert L. · Inventors: Whitson, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an interlocking masonry wall block having an open core, and spaced projections that enable stacked blocks to be interlocked setback , and staggered to, form a stable gravity-type retaining wall that is particularly suited for landscaping applications. The open core extends completely through the block from top to bottom. The block is formed by, front, rear and opposed side walls each having parallel inside and outside surfaces. One, projection extends from the lower surface of each side wall. The front of each projection is, forward the inside surface of the front wall to provide the setback when stacked on other like-, shaped blocks. Each block is …
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 August 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2023.
- 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.