Asphalt composites including fly ash fillers or filler blends, methods of making same, and methods for selecting or modifying a fly ash filler for use in asphalt composites
CA 2371099 A1 · Owner: Cornelius, Bruce J. · Inventors: Hill, Russell; Hemmings, Raymond T.; Cornelius, Bruce J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a fly ash filler or filler blend having a particle size, distribution with at least three modes that when combined with asphalt produces asphalt, composites such as roofing shingles with improved mechanical properties at a lower cost, than asphalt shingles produced using conventional calcium carbonate fillers. The present, invention also includes a method for producing an asphalt composite comprising the, steps of combining asphalt with a fly ash filler or a filler blend having a particle size, distribution with at least three modes and producing an asphalt composite with the, resulting filled asphalt. The present invention further includes a method of …
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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 14, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2023.
- 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.