Canadian application, no grantCanada
Tin-lead immersion bath
CA 2035579 A1 · Owner: Macdermid, Incorporated · Inventors: Ferrier, Donald R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Immersion tin-lead baths are provided preferably, free of hypophosphite ion, comprising a strongly acidic aqueous solution comprised of thiourea water-soluble, sources of divalent tin and lead a weak acid, and a weak, base.
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 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 1, 1991
GrantedNo grant recorded
Term endedFebruary 1, 2011
Patent numberCA 2035579 A1
Classification (IPC)C23C30/00 +2 more
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.