Apparatus and process for clearance of unexploded ordnance
CA 2237972 C · Owner: Xtech Explosive Decontamination Inc. · Inventors: Banerjee, Vikram K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A two-step process for clearing unexploded ordnance ("UXO") from the ground. First a high power electromagnetic transmitter sweeps the ground area to be decommissioned. Secondly a lower-power time-domain electromagnetic transmitter or metal detector sweeps the same area to locate UXO. The high power transmitter employs a waveform of having the same frequency and pulse duration as that of the metal detector but does so with at least twice the power. Firstly when the higher power waveform is applied to the ground UXO which does not trigger and detonate or "function" is proved as non- functioning at subsequent and lower detection power. Subsequently the ground area can then be safely scanned …
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 May 19, 1998 and granted April 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2020.
- 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.