Blasting method
CA 2265629 C · Owner: Sassa, Koichi · Inventors: Sassa, Koichi; Yamamoto, Masaaki; Noda, Hidehiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
The present invention relates to a blasting method which comprises conducting a delay blast at a particular location; predicting time series data of a waveform, of ground vibration or noise at a remote location to be generated by a hypothetical single-, hole blast at the particular location using at least one of previous time series data of a, waveform of ground vibration or noise generated by said delay blast and actually, monitored at the remote location and the corresponding previous actually applied initiation, time series of said delay blast; computing a delay blasting initiation time series for a delay, blasting, which provides a waveform of ground vibration or noise satisfying …
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 November 4, 1997 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2019.
- 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.