Immersion pyrometer
CA 1266787 C · Owner: Greenspan, David C. · Inventors: Bush, James R.; Tokay, Ernie; Greenspan, David C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective sheath for a temperature sensing device for use in determining the temperature of molten metals. The temperature sensing device such as a thermocouple, is, encased in a molybdenum tube which is coated with successive porous layers of molybdenum, a plurality of layers of A1203-Cr203-Mo in a decreasing concentration of Mo in proceeding from the inner to the outer layers and a layer, of substantially pure Al203-Cr203. The Al203-Cr203 layer may be covered with an outer coating of a material such as, boron nitride, to protect the Al203-Cr203 layer from attack by slag. Alternating layers of Al203-Cr203 and boron nitride may be applied as outermost sacrificial layers.
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 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2007.
- 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.