Method of forming concrete retaining wall block
CA 2133675 C · Owner: Allan Block Corporation · Inventors: Gravier, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for forming concrete retaining wall blocks from a single mold with selectable dimensions such that a retaining wall of a desired setback can be defined. One of a plurality of core bars is implemented with the mold during the manufacturing process to define a laterally extending recess of a same width across the lower major surface of a composite block. Subsequently the composite, block is split along a midsection thereof to form a pair of identical blocks, each block having a laterally extending front lip and a laterally extending lower recess. The depth of the recess corresponds to the setback of a retaining wall formed therefrom. The shallower the lower recess, the greater the …
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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 October 5, 1994 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2016.
- 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.