Method for forming an emulsion explosive composition
CA 2276375 C · Owner: Dyno Nobel Inc. · Inventors: Halander, John B.; Atkinson, Kerry S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A method of sensitizing and of forming an emulsion explosive composition comprises forming a fuel phase comprising an organic liquid fuel an emulsifier and unexpended organic microspheres with such fuel phase being at a temperature below the expansion temperature of the organic microspheres; forming an inorganic oxidizer salt solution at an elevated temperature above the expansion temperature of the organic microspheres; and mixing together the fuel phase and the oxidizer solution with sufficient shear to form a water-in-oil emulsion and to allow the elevated temperature of the oxidizer solution to expand the organic microspheres and thereby lower the density and increase the sensitivity of …
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.
Why it's free to use
- Filed June 28, 1999 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2021.
- 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.