Coke feed device for a coke dry cooling installation
CA 2100870 C · Owner: Dunker, Norbert · Inventors: Opdenwinkel, Heinz; Yasukouchi, Naoto; Kishigami, Kazushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coke feed device for the cooling, shaft (41) of a coke dry cooling installation which consists of a stationary hopper with an extraction line (9), a liftable an lowerable lower hopper section (18) and a movable, liftable and lowerable cooling shaft closure (8) to which is allocated a manipulating device (14) with a drive. The stationary hopper (1) or the liftable and lowerable lower hopper section (18) is fitted with a distribution bell (5), a sealing ring (111) is secured to the liftable and lowerable lower hopper section (18) or a liftable and lowerable sealing ring (11) is allocated to the stationary hopper (1) and a sealing ring (55, 31) is secured to the movable liftable and …
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 December 27, 1991 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 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
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.