Nitrogen and sulfur compositions and acid copper plating baths
CA 1104152 A · Owner: Rohco, Inc. · Inventors: Eckles, William E.; Starinshak, Thomas W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nitrogen and sulfur compositions are described which are useful in aqueous acidic plating baths and processes for electrodepositing bright and level copper coatings. The compositions are prepared by reacting a mixture of (a) a disulfide having the formula, RR'NCS22 (Formula I) wherein R and R' are each independently hydrogen alkyl or, aryl groups, and, (b) a halo hydroxy sulfonic acid having the formula X(CH2)nCHOH-CH2SO3M (Formula II), wherein X is a halogen n is one or two and M is hydrogen or an alkali metal, and, (c) an aliphatic aldehyde containing up to three carbon atoms, in, (d) an aqueous alkaline medium. Particularly bright and level deposits are obtained with these compositions …
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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 June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.