Corrosion-inhibiting aqueous coating compositions
CA 1316685 C · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Jack, James; Hoyle, William; Berner, Godwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Corrosion-inhibiting aqueous coating compositions Abstract of the Disclosure, An aqueous corrosion-inhibiting coating composition containing a) an aqueous film-forming binder and, b) as the corrosion inhibitor an effective amount of an, aliphatic or cycloaliphatic ditri- or tetra-carboxylic acid, which is substituted in its aliphatic or cycloaliphatic radical by at least one group of the formula I I, in which X is oxygen, sulfur or NH and each R independently of the others is hydrogen, alkyl, halogenoalkyl alkoxy, alkylthio, alkylsulfonyl, cycloalkyl phenyl, alkylphenyl, phenylalkyl, halogen - CN, -NO2, -COOH, -COOalkyl, -OH or, a primary secondary or tertiary amino or carbamoyl group and …
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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 April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
- 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.