Method and apparatus for handling concrete retaining wall blocks
CA 2357359 A1 · Owner: Manthei, James A. · Inventors: Manthei, James A.; Manthei, Benjamin R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for handling large concrete retaining wall blocks and the like. The blocks are cast in a form with the front face down a , lifting loop, extending from a rear face and with grooves extending in sides from a rear face to, adjacent the front face. A spear hook is secured to one of two fork lift tines to, extend to one side of the tine away from the other tine. The spear hook engages the, lifting loop on the block for lifting the block from the form and for rolling the block, into an upright position. The fork lift tines then engage the side grooves from the, rear of the block for lifting and moving the blocks and for stacking the blocks to, construct a retaining …
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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 September 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 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.