Building block
CA 1238798 A · Owner: Schmid, Donald T. · Inventors: Schmid, Donald T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a building block having two spaced supportive parts separated from one another by a quantity of insulating material positioned between the parts, the block supportive parts and insulating material engage one another over relatively large areas so that the engagement therebetween contributes effectively to the structural integrity of the block as a unit. The block insulating material is exposed at such locations around the block that when the block is installed in a block wall construction, the exposed locations are hidden from view by adjacent blocks.
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
- Granted July 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2005.
- 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.