Low density watergel explosive composition
CA 2095260 C · Owner: Cranney, Don H. · Inventors: Cranney, Don H.; Jackson, Michael M.; Lawrence, Lawrence D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
The present invention comprises a watergel explosive composition, and method of manufacturing the same that has a, density of less than 0.8 g/cc. The composition has good water resistance and is especially useful in blasting applications calling for lower energy explosives.
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 30, 1993 and granted August 17, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2015.
- 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.