Cooling method
CA 1103885 A · Owner: Boc Limited · Inventors: Rennie, Andrew L.; Davis, Alexander
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Moulds are made from refractory sand (or other particulate or granular material) obtained from that sand or material. In order to control the temperature of the sand used to form the new moulds the sand is heat, exchanged with a permanent gas in liquid or solid state or the cold vapour, thereof. The temperature of the sand is sensed. The heat exchange is controlled so as to keep the sensed temperature at or below a chosen maximum.
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 June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.