Continuous process for solvent-free manufacturing of composite thermosetting pyrotechnic products
CA 2204840 C · Owner: Wiencek, Dominique · Inventors: Lefumeux, Alain; Wiencek, Dominique
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
This is an invention related to the production of composite pyrotechnic materials through continuous processing. In a mixer (1) a thermosetting liquid binder (3) is mixed with a thickener (4) to obtain a viscous premix (2) which is non-reactive at ambient temperature and can then be mixed with oxidizers (17) to yield after extrusion and cutting, intermediate products (24) which are not yet set but do possess stable geometric sides. The structure of the intermediate products (24) is later hardened through setting of the binder in an oven (26). The invention makes possible the industrial production through continuous processing, of small composite pyrotechnic charges which are set and are …
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 8, 1997 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 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.