Liquid rinse conditioner for phosphate conversion coatings
CA 2198933 C · Owner: Ppg Industries, Inc. · Inventors: Wright, Angela
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an improved titanium containing phosphate composition and a process for preparing the titanium containing phosphate composition. The composition in the form of a dilute aqueous dispersion is useful as a rinse conditioner for activating ferrous zinc and aluminum metal , surfaces prior to the application of phosphate conversion coatings. The rinse conditioner forms stable baths and can be used for activating metal surfaces for extended periods of time.
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 August 16, 1995 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2017.
- 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.