Lime sludge feed arrangement
CA 2209594 C · Owner: Ahlstrom Machinery Oy · Inventors: Ahvenainen, Arto
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 of feeding lime sludge into an inclined rotary kiln (5), through the upper end of which the lime sludge to be burnt in the kiln is fed and the flue gases of the kiln are removed. The lime sludge is passed into the kiln through an outside duct (12) connected to the upper end of the kiln. The invention avoids virtually completely the contact at, the inlet to the kiln between the outgoing flue gasses and ingoing lime sludge flow.
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 July 3, 1997 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 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.