Process for producing furnace atmospheres by deoxygenating noncryogenically generated nitrogen with dissociated ammonia
CA 2111627 C · Owner: Eichelberger, Donald P. · Inventors: Kilhefner, Paul T. Iii; Bonner, Brian B.; Eichelberger, Donald P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing low-cost furnace atmospheres suitable for annealing and heat treating ferrous and nonferrous metals and alloys brazing metals and ceramics, sealing glass to metals and sintering, non-ferrous metal and ceramic powders from non-cryogenically produced nitrogen containing from 0.05 to 5.0% residual oxygen is presented. The disclosed process involves 1) mixing non-cryogenically produced nitrogen with a pre-determined amount of dissociated ammonia 2) passing the mixture, through a low-pressure drop catalytic reactor 3) converting the residual, oxygen to an acceptable form such as moisture and reducing the residual oxygen level to below about 10 ppm, and 4) using the …
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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 December 16, 1993 and granted January 20, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2015.
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