Silicone primer
CA 2061046 A1 · Owner: Berg, Daniel T. · Inventors: Berg, Daniel T.; O'Brien, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The bonding of a sealant or coating to a substrate can be improved by applying to the substrate a composition containing a specified polydiorganosiloxane and a specified reactive compound, then applying the sealant or coating to the cleaned and treated substrate. The polydiorganosiloxane is a linear polydiorganosiloxane having a viscosity of from 10 to 50 centistokes at 25°C. or a cyclic polydiorganosiloxane having 4 or 5 silicon atoms. The reactive compound is a mixture of silanes or silicates of the formula RnSi(OZ)4-n' where R is a monovalent hydrocarbon or substituted hydrocarbon of from l to 4 carbon atoms or phenyl; Z is an acyl radical of less than 4 carbon atoms R, or R"OR …
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 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2014.
- 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.