Method and apparatus for injecting no_inhibiting reagent into the flue gas of a boiler
CA 2120322 C · Owner: Langley, Donald C. · Inventors: Vetterick, Richard C.; Langley, Donald C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method including a conduit with a nozzle for injecting NOx inhibiting reagent into an appropriate temperature window in the flue gas of a package utility, or industrial type boiler to reduce emissions of NOx. A sensor mounted adjacent the nozzle to measure the flue gas temperature thereby locating the appropriate temperature window and a controlled drive for moving the nozzle to the temperature window.
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 30, 1994 and granted February 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2016.
- 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.