Concentrate for activating and refining bath and bath obtained from this concentrate
CA 2088342 C · Owner: Cfpi · Inventors: Schapira, Joseph; Sudour, Michel; Lerouge, Veronique
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Concentrate for activating and refining bath employed in processes of zinc phosphatization characterized, by the fact that it is based on an aqueous dispersion containing from 2 to 20% by weight of Jernstedt salts, the concentration of titanium in the dispersion consequently being from 140 to 10,000 ppm of Ti this, dispersion in addition containing: - a proportion of from 0.2 to 8% by weight of at least one dispersing or sequestering agent and, - a proportion of from 0.05 to 7% by weight of at least one thickener based on polysaccharide.
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 January 28, 1993 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2015.
- 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.