Curable composition
CA 2052677 C · Owner: Palasz, Peter D. · Inventors: Nield, Eric; Palasz, Peter D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A) an aqueous dispersion of a Polymer having a MWt of at least 50,000, which is insoluble in water and which contains silane groups of formula;, in which a is 0 to 2, R1 is C1-6 alkyl and R is, OH or a hydrolysable group and B) a solution or dispersion of a Polymer which has a MWt between 300 and 20,000, comprising at least two silane groups of formula (1) and also, comprising covalently bonded cationic hydrophilic groups in an amount so as to render the Second Polymer, soluble or self-dispersible in the aqueous medium, the ratio of the Polymer (A) to the Polymer (B) being in the range 40:1 to 1:4.
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 October 2, 1991 and granted May 18, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 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.