Ignition transfer medium
CA 1302094 C · Owner: The Secretary Of State For Defence In Her Britannic Majesty'S Government Of The United Kingdom Of Great Britain And Northern Ireland · Inventors: Blewett, Francis Mccartney; Sykes, Anne Frances; Pike, Gary Edwin John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
Disclosed is an ignition transfer medium for interconnecting the ignition and later combustion stages of a pyrotechnic device comprising charcoal cloth on which an inorganic oxidant, such as potassium nitrate, is deposited. The medium may also include one or more additional substances to modify the burning characteristics or heat output and as an example a medium, containing 1.0 to 3.5 parts by dry weight of potassium nitrate to 1 part of charcoal cloth may also include 0.05 to 0.40 parts of picric acid. In this example, the picric acid may either be adsorbed on to the cloth fibres before the potassium nitrate is deposited on to the cloth, or the two substances may be deposited …
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
- Granted June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2009.
- 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.