Asphalt road composition and process of making same
CA 1057466 A · Owner: Walter, C. Edward · Inventors: Walter, C. Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An asphaltic pavement course composition is disclosed, as well as process for making same. The composition utilizes, as the major ingredient the, residue from a refuse incinerator which residue contains, less than 6%, preferably less than 2% by weight of, ferrous material. The low-ferrous content residue is combined in an asphaltic road base course composition or other asphaltic pavement course composition also containing asphalt and mineral aggregates, to produce a pavement course material with excellent physical properties at low cost. Incinerator residues are a major source of environmental pollution requiring the use of sanitary landfills to dispose of same and the present invention …
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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
- Granted July 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 3, 1996.
- 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.