Electro-optical detonator
CA 2031409 A1 · Owner: Yarrington, Arthur G. · Inventors: Yarrington, Arthur G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
8. ABSTRACT:, The invention relates to a Optical Detonator comprising provision to accept a fibreoptic light guide cable 14 within a terminal socket 12 whereby a electromagnetic radiation signal passed down the fibreoptic light guide cable 14 activates a photo-conductor device 16 located within the hollow body portion 3 of the detonator 1 to allow adjacent primary battery means 20 as the electrical energizing source to pass a electric current through fusehead 7/8 to fire the detonator. 8.
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 4, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2012.
- 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.