Method for improving the strength of bitumen, asphalt or a similar material, and a composition obtained by the method
CA 2082679 A1 · Owner: O Pinomaa Ky · Inventors: Pinomaa, Olli L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for improving the properties of bitumen, asphalt, or a similar material by adding to it a thermoplastic or a thermoelastomer, the solubility and compatibility of the thermoplastic or thermoelastomer being improved by a third component, which is wood resin turpentine, resin, a derivative of these tall oil, tall-oil pitch, or a, constituent or mixture of these. The obtained composition of bitumen, asphalt or a similar material can be used as a binding agent in road pavement materials.
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 November 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 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.