Cooling gas injection nozzle for a vacuum heat treating furnace
CA 2350773 A1 · Owner: Moller, Craig A. · Inventors: Moller, Craig A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nozzle for injecting a cooling gas in a vacuum heat treating furnace is described. The cooling gas injection nozzle according to the present invention has, a forward portion with a first central opening formed therethrough. The cooling, gas injection nozzle also has a rear portion with a second central opening formed, therethrough. A flap is disposed in and pivotably supported in the first central, opening. The flap operates to substantially prevent the escape of heat from the, hot zone during a heating cycle, but permits the injection of the cooling gas into, the furnace hot zone during a cooling cycle. The cooling gas injection nozzle is, supported from the hot zone wall by any …
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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 June 14, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2023.
- 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.