Humidifying apparatus
CA 2002345 A1 · Owner: Union Carbide Canada Limited · Inventors: Maric, Radovan R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The humidity of the atmosphere of a heat-treating furnace is controlled by the use of superheated steam which is generated by the use of a furnace-heated humidifier to which water is fed through a capillary tube. A secondary gas flow passes through the humidifier and is humidified by the superheated steam. The humidified secondary gas flow then passes to a primary gas flow to be mixed therewith before the, primary gas flow passes to the furnace atmosphere.
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 6, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2011.
- 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.