Composition for desmutting aluminum
CA 2337374 A1 · Owner: Atotech Deutschland Gmbh · Inventors: Mehta, Maulik Dhanesh; Butkovsky, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides an improved composition and process for pretreatment aluminum prior to electroplating. The invention is an aqueous composition comprised of an acid, an oxidizing agent and, optionally, a halogenated compound. This composition is useful in a process that effectively removes smut that results from the etching step of the aluminum pretreatment process. Alternatively the composition can be used in a, process which combines the etch and desmut steps in Al pretreatment.
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
- Filed February 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2023.
- 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.