Compact lance
CA 2002233 C · Owner: Marmann, Horst · Inventors: Marmann, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compact lance, for tuyeres. The lance provides a compact and secure holder by providing a bushing between a collet chuck and a gasket sleeve. This bushing can move axially inside an inner hole of the handle, but cannot rotate in the hole. The bushing acts on the collet chuck to keep it immobile. Twisting of the tuyere is prevented by a slot in the bushing a radial hole in the, handle and a locator screw. By turning the locator screw down to the outer jacket of the tuyere, there is a fastening of the tuyere inside the tuyere holder. There is also a gas and slag holdback valve in the handle and a streamlined quick-action stop valve. A rapid closing valve is also provided and operated by …
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 3, 1989 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 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.