Delay blasting assembly
CA 1046812 A · Owner: Cxa Ltd./Cxa Ltee. · Inventors: Welsh, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
The invention provide for a non-electric delay period blasting assembly which may be easily connected to a length of low energy initiating cord in the field. The assembly comprises a delay period cap having a special moisture-proof closure which accommodate the energy transmitting end of an initiation cord.
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 January 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 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.