Method for production of granules
CA 2071400 C · Owner: Elkem A/S · Inventors: Forwald, Karl; Fossheim, Rune; Kjelland, Torbjorn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for granulating a stream of molten metal which is caused to fall from a launder or the like or down into a liquid cooling bath contained in a tank. The metal stream is divided into droplets in the liquid cooling bath which droplets solidifies and forms solid granules while a cooling liquid flow having a, substantially uniform flow is caused to flow from one of the sidewalls in the tank and substantially perpendicular against the falling metal stream said flow of cooling liquid, having a velocity of less than 0,1 m/second. The distance from the outlet of the launder and to the surface of the liquid cooling bath is kept less than 100 times the …
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
- Filed June 17, 1992 and granted October 7, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2014.
- 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.