Polyurethane-containing sealant and coating
CA 2108015 A1 · Owner: Evans, Robert M. · Inventors: Evans, Robert M.; Xiao, Han X.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
By way of summary the present invention relates to waterborne coating compositions, methods of preparing such compositions and, methods of applying such compositions. More particularly but, without limitation, two compositions of the present invention comprise water-containing dispersions, suspensions or emulsions employing either (a) about 10 % to about 90 % by weight of the final, compositions, of a select urethane-urea dispersion; having incorporated therein either (b) about 10 % to about 90 % by weight of the, final composition, of a bituminous material such as asphalt or , (c) about 10 % to about 90 % by weight of the final composition, of a (vinylic) latex material. An additional …
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 April 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 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.