SULFATES AND SULFO-DERIVATIVES OF .beta.-NAPHTHOL POLYGLYCOL ETHERS AND ACID ZINC BATHS CONTAINING THESE COMPOUNDS
CA 1267655 C · Owner: Atotech Deutschland Gmbh · Inventors: Voss, Gunter; Seidenspinner, Hubert-Matthias
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides sulfates and sulfo-derivatives of the general formula, I, where X represents a possibly substituted bivalent C1 to C6 alkylene group or a possibly substituted bivalent phenylene group, M represents hydrogen, an alkali metal atom or a corresponding equivalent of a bivalent metal n Is a whole number from, 6 to 60 and m is 0 or 1 and to acid zinc electroplating baths containing these compounds. Such baths permit good deposition of metal with minimal foam production.
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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.