Method for forming a heat treating atmosphere
CA 2091209 A1 · Owner: Frey, Rick · Inventors: Frey, Rick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for forming a heat treating atmosphere in which a nitrogen rich gas is produced from air through a membrane separation system or a pressure swing adsorption system. The nitrogen rich gas is reacted with a hydrocarbon gas in the presence of a non-noble metal catalyst preferably in a modified reactor, to produce a high nitrogen content heat treating atmosphere containing reduced amounts of carbon monoxide and hydrogen.
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 March 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2015.
- 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.