Removing coatings from pipe
CA 1048872 A · Owner: Jet Research Center · Inventors: Grundy, Charles D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A method and an article of manufacture useful in the method are provided for removing a fracturable coating such as concrete, from a conduit, such as an underwater pipeline. According to the method a plurality of spaced explosive detonating cords are placed against the portion of the coating to be removed. Upon detonation of the explosive detonating cords the coating is sufficiently fractured to enable its convenient removal from the conduit by a diver but the conduit is only very slightly damaged, if at all, by the explosion.
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 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 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.