Cement based patching composition for asphalt pavement
CA 2062219 A1 · Owner: Weill, Ed · Inventors: Crenson, Geoffrey A.; Weill, Ed
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paving composition comprises a cement binder a, dispersible latex polymer binder, and a mineral aggregate filler such as sand. The filler may be made up of mineral fines such as fly ash, mineral aggregate such as sand, and/or an elastomeric filler such as ground rubber particles. The composition may further include a defoamer, a plasticizer and a dispersible pigment the, latter preferably being a black pigment to to color the composition to that of asphalt pavement. Preferably the, composition is in the form of a dry mixture capable of forming a hard patch bonded to an asphalt surface when admixed with water in which the cement binder comprises up to about 15 percent by weight of the …
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 March 3, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 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.