Method of producing pyrotechnic masses
CA 2106056 A1 · Owner: Chan, Sek Kwan · Inventors: Kirby, Ian John; Chan, Sek Kwan; Oliver, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
METHOD OF PRODUCING PYROTECHNIC MASSES" Precipitation of fine azide core particles with in-situ coating with suspended tiny oxide particles followed by, concentration of the dilute suspension of these bodies to form a slurry with residual dissolved azide in the liquor and finally converting the slurry in to solid aggregates of the pyrotechnic bodies by e.g. prilling whereby liquid phase evaporation releases dissolved azide causing the pyrotechnic bodies to be adhered together in to larger aggregates.
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 September 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2015.
- 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.