Heating apparatus for induction ladle and vacuum furnace
CA 2105246 C · Owner: Cignetti, Nicholas P. · Inventors: Cignetti, Nicholas P.; Heine, Hans G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An induction heating furnace (10) is, disclosed comprising an induction coil assembly (16) and a ladle (12) having a metallic shell (14) that supports a crucible holding metal to be heated by the furnace. The ladle (12) is readily separated from the induction coil assembly (10) so that the heated metal may be conveniently and reliably moved among operational stations. The induction coil assembly (10) has a preselected length which is less than the length of the shell (14). The induction coil assembly (10) surrounds, but does not touch the shell (14) and generates an electromagnetic induction field. The induction coil assembly (10) comprises a coil (20) upper and lower yokes (28 and 34) and …
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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 August 31, 1993 and granted April 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 2015.
- 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.