Insulating concrete form utilizing interlocking foam panels
CA 2188945 C · Owner: Wallsystems International Ltd. · Inventors: Boeck, Erwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A concrete form system in which a plurality of foam panels (10, 12, 14, 16) are interlocked transversely horizontally and vertically by a plurality of connectors (18, 20). The panels have opposed upper and lower ends, with a plurality of coplanar passages (58) extending into the upper ends at regularly spaced intervals. An equal plurality of coplanar passages (58) extend into the panels' lower ends at the same regularly spaced intervals to vertically align each upper end passage (58) with a corresponding lower end passage (58). Each connector (18, 20) has a first bar (38) which interconnects transversely opposed first and second parallel vertically, extending planar segments (30 32); and, a …
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 April 21, 1995 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2017.
- 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.