Automatic lance-changing device
CA 2003179 A1 · Owner: Fries, Daniel · Inventors: Heintz, Carlo; Stomp, Hubert; Devillet, Serge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an automatic coupling for a lance as used in steel production to couple the lance head to the lance body, whereby the substances for refining and the cooling fluid for the lance can be passed through the coupling head. The connection is provided to the coupling head (6) by coupling hooks (4), which are rotatably mounted by eccentric elements and through actuation of these eccentric elements are vertically movable.
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 November 16, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2011.
- 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.