Corrosion inhibited compositions
CA 1161633 A · Owner: Ciba-Geigy Ag · Inventors: Clark, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Corrosion-inhibited compositions are described comprising a functional fluid in contact with a ferrous metal and as corrosion, inhibitor, a compound having the formula: wherein X is H, an alkali- or alkaline earth metal NH4, the, residue of a protonated amine or the group -OX is the residue of, an alkanol having from 1 to 20 carbon atoms or of ditri- or, tetra-ol having from 2 to 12 carbon atoms; R1 R2 and R4 are the, same or different and each is H or -CH2CH2COOX wherein X has its previous meaning; R3 and R5 are the same or different and each is H, -CH2CH2COOX wherein X has its previous meaning or R3 or, R5 is a straight- or branched chain alkyl group having from 3 to 16 carbon atoms; or …
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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 February 7, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2001.
- 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.