Valve plate for a sliding gate valve on a vessel containing metal melt
CA 2083217 A1 · Owner: Stopinc Aktiengesellschaft · Inventors: Waltenspuhl, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The refractory valve plate (22) for a sliding gate valve (20) on a vessel (10) containing metal melt has a refractory plate (31) with a recess on its side directed away from the sliding surface (22') which broadens the flow opening (25) and in which a highly refractory insert (30) is embedded which, together with the adjoining plate (31), defines a gap (32) which communicates with the flow opening (25) and which serves for the injection of gas. This gap (32) is preferably formed as a free clearance in which the insert (30) rests directly on the refractory plate (31). An annular gas chamber surrounding the gap (32) is coupled to a gas connection (33). The gas can thus be blown constantly or …
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 November 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2014.
- 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.