Mould for concrete block moulding machines
CA 2111566 A1 · Owner: Keller, Gottfried · Inventors: Keller, Gottfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mold for concrete-block molding machines is proposed. It comprises a molding frame having at least one chamber which is open at the top and bottom and which is bounded by chamber walls (1, 2). So that the molded concrete body (3), insertion parts or layer elements and after the molding operation, the insertion part together, with the concrete body or the composite body can be, raised and carried in the mold there is installed in at, least one chamber wall a clamping device which has a clamping member movable into the chamber essentially perpendicularly to the chamber wall. There can be used in particular, as a clamping device an elastic hose (6) which is loaded by a pressure medium and …
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 7, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.