Alkaline earth metal salts, transition metal salts and transition metal complexes of ketocarboxylic acids as corrosion inhibitors
CA 2120589 A1 · Owner: Novartis Ag · Inventors: Braig, Adalbert; Frey, Markus; Armstrong, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alkaline earth metal salts. transition metal salts and transition metal complexes of ketocarboxylic acids as corrosion inhibitors Abstract, There are described novel alkaline earth metal salts transition metal salts and transition, metal complexes of compounds of the formula I (I), in which R1, R2, R3, R4 and R5 are independently of one another, hydrogen halogen, nitro, cyano, CF3, C1-C15alkyl C5-C12cycloalkyl, C2-C15alkenyl, C1,C12haloalkyl C1-C12alkoxy, C1-C12alkylthio, C6-C10aryl which is unsubstituted or substituted by C1-C4alkyl; C6-C10aryloxy which is unsubstituted or substituted by C1-C4alkyl; C7-C12 arylalkyl which is unsubstituted or substituted on the aryl radical by from 1 to 3 …
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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
- Filed April 5, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2016.
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