Method and apparatus for transfer of initiation signals
CA 2242247 C · Owner: Renfro, Steven L. · Inventors: Renfro, Steven L.; Burton, Jeffrey H.; Toro, Daniel A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A method and apparatus for transferring non-electric blasting initiation signals from detonating cord signal donor lines to signal transmission tube input lines involves disposing the acceptor line in enhanced signal transfer configuration with the donor line. The input line (30) may constitute the input lead (29a) of a detonator (10a). Enhanced signal transfer configuration between the input lead (29a) and the detonating cord (60) can be established by disposing input line (30) in at least partial wrap-around contact with the detonating cord (60). or in multiple abutting contact with the detonating cord (60). Enhanced signal transfer configuration can also be achieved for a detonator …
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 December 3, 1996 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2018.
- 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.