Method of inhibiting cold end corrosion in boilers
CA 1295474 C · Owner: W. R. Grace Co. · Inventors: Engstrom, Gary G.; Gauwitz, Donald P.; Salihar, Mark W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ref. 03-6588, METHOD OF INHIBITING COLD END CORROSION IN BOILERS Abstract of the Disclosure, A liquid borate is added to sulfur trioxide-containing combustion gases at a temperature of from about 250 to about 1000°F. in a boiler or other furnace system. The borate neutralizes sulfuric acid in the gases and inhibits sulfuric acid corrosion and deposition on metal surfaces of the system that contact the gases. An organic deposit modifyinq agent such as sorbitol and an additional acid neutralizing agent such as an alkali metal hydroxide aluminate, or silicate may also be added to the combustion qases.
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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
- Granted February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 2009.
- 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.