Pegblok
CA 2068107 A1 · Owner: Freel, Douglas Munro · Inventors: Freel, Douglas Munro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Current wall building methods using modular blocks generally employ materials such as concrete, clay stone,mud and glass, erected with the vertical joints staggered and relying upon a, mortar or other adhesive to bind adjoining surfaces to provide the desired structural lateral stability. The degree of verticality and flatness of the finished wall is however in direct proportion to the ability of the erector to lay true and even beds, and to continually "adjust" the separate units as the wall grows. In this invention the modular block is rigid insulation with, various holes running vertically through the block from top to bottom. The block may be manufactured using either extrusion or …
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 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2014.
- 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.