Composition and method of stimulating subterranean formations
CA 1280885 C · Owner: Haliburton Company · Inventors: Walker, Michael Lewis; Gdanski, Ricky David; Ford, William Gerald Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and composition for stimulating subterranean formations containing iron deposits. The composition comprises an admixture of (i) at least one member selected from the group consisting of hydroxylamine hydrochloride, hydroxylamine hydrobromide, hydroxylamine sulfate, hydrazine monohydrochloride, hydrazine dihydrochloride hydrazine, sulfate, hydrazine monobromide hydrazine dibromide, hydrazine monoiodide hydrazine diiodide and, hydroquinone together with (ii) at least one member selected from the group consisting of gluconodeltalactone, citric acid, salts of citric acid ethylene-, diaminetriacetic acid, salts of ethylenediaminetetraacetic acid, nitrilotriacetic acid salts of, …
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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 March 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2008.
- 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
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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.