Process and device for erecting concrete walls by means of braced shutterings
CA 2134473 C · Owner: Rascor Spezialbau Gmbh · Inventors: Schmid, Rene P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and device are disclosed for erecting concrete walls by means of braced shutterings. Shuttering planks (1 2), are braced parallel to each other at a distance from each other that corresponds to the thickness of the concrete wall to be erected, by means of bracing anchors (3) having tubular spreaders (4). The bracing anchors (3) are removed from the erected concrete wall after the gap between the shuttering planks has been run in, and the shuttering planks (1 2) are, knocked off. The tubular spreaders (4) remaining in the concrete walls are filled with grouting material in order to seal the bracing spots. The grouting material is pressed into cavities and/or cracks located outside …
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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
- Filed May 13, 1993 and granted January 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 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.