Sealing system for locks of counter-pressure blast furnaces
CA 1137308 A · Owner: Wurth (Paul) S.A. · Inventors: Burmann, Jurgen; Sieweke, Wilhelm; Nettler, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for preventing dust from baking onto the steel sealing ring of a sealing valve In a biast furnace. Heating elements are provided around the outer periphery of the sealing ring in order to avoid condensation of the moist gas on said ring.
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
- Granted December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.