Water-cooled housing for a hot-blast slide valve
CA 2104395 A1 · Owner: Werner, Marcel · Inventors: Werner, Marcel; Rausch, Jos
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A HOT-BLAST SLIDE VALVE APPLICANT, NOUVELLE USINE DE WECKER S.A. INVENTORS Jos RAUSCH, Marcel WERNER, ABSTRACT, The invention concerns a water-cooled casing for a hot-blast slide valve, in particular a slide valve in a pipe lined with refractory material. The casing has annular cooling-water ducts disposed concentrically with respect to each other in pairs one, downstream of the other with respect to the hot-air blast and on both sides of the space through which the sliding plate of the valve passes. The annular ducts (26,29) are formed by two monobloc-construction casing components (22,221) each of which has, two substantially annular hollows the hollows being closed over by, first 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 December 3, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.