Thermal treatment of glass
CA 1069700 A · Owner: Pilkington Brothers Limited · Inventors: Cross, Raymond P.; Thomas, Derek E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The thermal treatment of glass is effected by heat transfer between the glass and a gas-fluidised particulate material which is in a quiescent uniformly expanded state of particulate fluidisation. Class sheets are thermally toughened by immersing each glass sheet, which is at a temperature above its strain point in the gas-fluidised bed which is in said quiescent state prior to the immersion of the glass in the bed. - 1 -
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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.