Interlocking building block
CA 1293621 C · Owner: Haener, Juan · Inventors: Haener, Juan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A block of concrete or the like for use in constructing a mortarless wall is provided which includes a spaced parallel pair of upright sidewalls having flat bottoms and tops and bearing integral block interlocking connectors on their opposite ends. The sidewalls are integrally connected to one or more transverse webs extending from the bottom of the sidewalls to above the tops thereof. Parallel slits may divide the upper end of the web into knock-off portions for installation of reinforcing bars. Each web has a central concavity in the upper end of at least one opposite side thereof which, concavity slope down into a complimentary central bottom convexity. The web tapers in thickness from …
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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
- Granted December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
- 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.