Glass-melting furnaces
CA 1202057 A · Owner: Corning Glass Works · Inventors: Carley, Harold J.; Palmquist, Ronald W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a glass melting furnace electrodes and other, devices may be protected from degradation by oxygen above an oxidation temperature thereof by immersion into the glass. In such a glass-melting furnace electrodes are inserted, through the batch in symmetrical locations spaced from sidewalls of the furnace. Melting and refining takes place in relatively narrow bands below the batch.
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 March 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 2003.
- 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.