Process for recycling a paved surface and apparatus therefor
CA 2061682 C · Owner: Wiley, Patrick C. · Inventors: Wiley, Patrick C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for recycling an asphaltic surface. The process comprises: (a) providing an asphaltic surface having an upper surface for recycling; (b) rupturing the upper surface to a depth of at least about 1.5 inches to provide a ruptured upper surface; (c) heating and mixing the ruptured upper surface on the asphalt surface to a temperature in the range of from about 100° to about 350°F to produce a heated ruptured upper, surface which is substantially free of moisture; and (d) pressing the heated ruptured, upper surface to provide a recycled pavement surface. An apparatus adapted for carrying out the process is also described.
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 21, 1992 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 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.