Process for marking a pavement
CA 2061284 A1 · Owner: Shell Canada Limited · Inventors: De Keyzer, Noel R. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for marking a pavement comprising melting a dryblended thermoplastic pavement marking composition which contains an elastomer and a substantially cycloaliphatic and/or aliphatic hydrocarbon resin and applying the molten composition thus obtained to the pavement, wherein the elastomer is a block copolymer containing at least one predominantly poly(conjugated diene) block which may or may not have been hydrogenated and at least two predominantly poly(vinylaromatic) block which block copolymer is, present in the dry-blended composition in the form of a powder. C13/T0849FF
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 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 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.