System and method for simultaneously heating and cooling glass to produce tempered glass
CA 2499488 C · Owner: Boaz, Premakaran T. · Inventors: Boaz, Premakaran T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for heating, forming and , tempering a glass sheet includes pre-heating the glass sheet to at least a first predetermined temperature. The system and method includes also applying radio-frequency energy to the glass sheet to heat it to at least a second predetermined temperature and cooling at least one outer surface of the glass sheet to at least a third predetermined temperature to temper the glass sheet and, wherein said steps of heating and cooling comprises providing at least one electrode; applying radio-frequency energy from the electrode to the glass sheet; and applying at least one air stream through the electrode to the at least one outer surface of …
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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
- Filed September 18, 2003 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2025.
- 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.