Process for the avoidance of corrosion of metallic materials
CA 1292864 C · Owner: Ohlendorf, Dieter · Inventors: Ohlendorf, Dieter; Interthal, Werner; Stoll, Friedrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Use of the compounds of the formula R1-(C2H4O)n-K(+) A(-) (I) or , (II), in which R1 denotes C12-C26-alkyl or C12-C26-alkenyl n denotes, a number from 0 to 5, K(+) denotes a group of the formulae, or , R2 C1-C3-Alkyl, R3 C1-C3-Alkyl or a group of the formula -(C2H4O)xH, x denotes a number from 1 to 3, A(-) denotes an anion, R9 denotes a group of the formula R?-(OCH2CH2)n-, C8-C18-alkylaryl or aryl-C8- C18-alkyl, R? denotes C14-C22-alkyl or C14-C22-alkenyl n, denotes a number from 0 to 5 and the radicals R10 are identical and denote C1-C4-alkyl or C1-C4-hydroxyalkyl as corrosion protection agents for metallic materials in aqueous media.
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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 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
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.