Explosive comprising a foamed sensitizer
CA 2040346 C · Owner: Orica Explosives Technology Pty Ltd. · Inventors: Villamagna, Fortunato; Lee, Ming C.; Chattopadhyay, Arun K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A sensitized explosive composition, and a method of production therefor, wherein the composition is sensitized by the addition of a gas void-containing gas-in-liquid foam, to a base explosive composition. The foam is produced in water or in a non-aqueous liquid carrier and is preferably, stabilized by the addition of viscosity control and foaming agents. The explosive composition may be for example, a, water-in-oil emulsion explosive or an oil-in-water slurry explosive. The sensitized explosives thus produced are manufactured by a method having improved safety greater low, temperature manufacturing flexibility and are more, economical than microballoon gas void-containing explosives of the …
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 April 12, 1991 and granted June 12, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2013.
- 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.