Production of aggregate material coated with bituminous binder
CA 1060278 A · Owner: Frederick Parker Limited · Inventors: Jervis, Dennis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of the Invention:, The invention relates to a process for coating aggregate material with .epsilon. bituminous binder for use in the construction of roadways and the like. In order to minimise the formation of dust the material, is first mixed in an undried unheated condition with, cohesion-promoting additives such as lime or asbestos, then transferred into a region where it is subjected to the passage of heated gases flowing in the same direction as the material, which is then brought into contact with liquefied bitumen.
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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 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.