Method of cutting metal elements underwater and a shaped explosive charge device therefor
CA 1071091 A · Owner: Imperial Chemical Industries Limited · Inventors: Cross, Graham W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
Improved methods of cutting metal elements underwater wherein a shaped explosive charge cutting device has a quantity of externally disposed foam which reduces secondary damage to the cut metal edges.
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
- Granted February 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 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.