Protecting metallic layers on substrates
CA 1316435 C · Owner: Johnson, Peter William · Inventors: Waddington, Keith John; Johnson, Peter William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-, Abstract, A method of producing an article which comprises applying a non-ferrous metal layer on a substrate and protecting metal layer by applying thereto a compound having a nitrogen atom which is linked to the remainder of the compound by three single bonds and which has an accessible electron lone pair, such that the electron lone pair bonds to the metal to form a complex which is insoluble or substantially insoluble in water and which protects the metal layer. The compound is preferably 1,4-diazobicyclo (2,2,2) octane. The method is of particular use in the production of mirrors comprising a transparent substrate on which is deposited a silver layer followed by a copper layer, the …
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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 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 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.