Tie-wire for concrete form
CA 2094322 A1 · Owner: Johnson, Kevin M. · Inventors: Johnson, Kevin Morris; Johnson, Brent A.; Johnson, Brent Allen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In construction panels used during the pouring of concrete for housing or commercial foundations it is known, that metal tie-wires are used to secure the panels in their proper position once the panel latches are engaged into the latch engagement areas at either end of each tie-wire. There is a natural tendency due to expansion, for the, panels to move to the outermost portion of the latch engagement areas when placing each set of panels. In this invention, the panels are held temporarily in their proper position by a frangible clip that is part of the latch engagement area on each tie-wire. Therefore when the panel, latches are hammered into the latch engagement areas the, frangible clips …
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 19, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2015.
- 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.