Method and apparatus for manufacturing a crack repair product and repairing a crack using the product
CA 2203188 C · Owner: Dalton, John A. · Inventors: Dalton, Peter F.; Dalton, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for manufacturing a crack repair product and a method of repairing a crack using the product are disclosed. The material is made by heating and softening a bulk sample of direct-fire crack sealer material. The softened material is then extruded into a strand having a predetermined diameter. An anti-adherent material such as a polyethylene film is then applied to the extruded material, and the material is drawn along its length to reduce the diameter of the material to a desired diameter. In order to repair a crack a length, of the material is selected and has a diameter corresponding to the crack width.The material is packed into and near the top of the crack and is …
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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 April 17, 1997 and granted June 26, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2019.
- 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.