Device for propellant powder
CA 1106804 A · Owner: Societe Nationale Des Poudres Et Explosifs · Inventors: Fontaine, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a hopper for receiving or handling propellant powder provided with an upper charging orifice for the powder characterised in that the hopper comprises a side vent possessing means for preventing the escape through said vent, and a zone in the side wall of the hopper located between the vent and the charging orifice. This zone is made of material which can be destroyed under the conjugate action of the pressure applied by the powder and the flames generated on the outside of the hopper near this zone.
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, and the Claude kit works from them.
Why it's free to use
- Granted August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 1998.
- 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.