Corrosion inhibitor
CA 1080956 A · Owner: The Dow Chemical Company · Inventors: Krawczyk, Leroy S.; Oakes, Billy D.; Asperger, Robert G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A corrosion inhibiting composition for removal of acid gases from natural or synthetic gas streams comprising a solvent selected from alkanolamines tetra-, hydrothiophene - 1,1-dioxide, potassium carbonate and diglycolamines, and an inhibitor system consisting essentially of (1) a source of copper ion selected from copper metal, copper sulfide and copper salts and (2), a source of sulfur atoms selected from (a) sulfur and (b) hydrogen sulfide and/or carbonyl sulfide in combination with an oxidizing agent that will produce in solution the sulfur atom, at least some of which is the polysulfide.
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
- Granted July 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 8, 1997.
- 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.