Asphalt mixture
CA 1086457 A · Owner: Jones, Cyril T. · Inventors: Jones, Cyril T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing an improved asphalt mixture by adding coal materials thereto. Low carbon content coal materials are separated into first and second portions the, first portion being soft-burned at approximately 600°F and the second portion being exposed to a number of wetting and drying cycles, followed by a thorough leaching. The first and second portions are crushed and screened to produce a fine particulate coal material having a maximum diameter passing through a 200 mesh screen, and a larger size coal material having a maximum diameter of 3/4 of an inch. In a first embodiment, an asphalt paving material is produced by adding the fine particulate coal materials to an …
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
- Granted September 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 1997.
- 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.