Method and apparatus for heat treatment of pulverous material
CA 2044429 C · Owner: Jorgensen, Bjarne M. · Inventors: Neubert, Erik; Jorgensen, Bjarne M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
By a method for heat treatment of pulverous material e.g. burning of lime, the lime is first preheated by means of exit gas in a preheater (1, 2, 3) and subsequently burnt in a calciner (4, 14), after which the burnt lime is cooled in a cooler (6, 7). In order to being able to alter the reactivity of the finishburnt lime, the calciner is divided into two chambers namely, a first chamber (4) in which the lime is burnt at e.g. 1050°C, and a second chamber (14) in which a larger or smaller portion of the lime is further burnt at a higher temperature e.g. 1300°C. By means of a splitting gate (16) in the outlet from a separation cyclone (5) for the calciner (4, 14) it is possible to, determine …
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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 12, 1991 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2013.
- 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
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Sources & verification
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.