Low volatile organic content hybrid silica binder
CA 2057405 C · Owner: Akzo N.V. · Inventors: Flasch, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A low volatile organic content hybrid silica binder with, a total silica content of about 29% to about 42% by weight suitable for use in the manufacture of zinc-rich primer coating compositions is disclosed. The binder comprises a predominant amount of a silica component derived from the hydrolysis of an organic silicate and a lesser amount of a silica component derived from a silica sol. The solvent component comprises no more than about 75% by weight of an organic solvent having a volatility equal to or greater than the volatility of a C1 to C3 alkyl monohydric alcohol and about 25% by weight or more of a solvent having a lesser volatility than the volatility of a C1 to C3 alkyl …
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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
- Filed December 11, 1991 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 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.
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.