Electrical heater
CA 2496960 C · Owner: Longview Research & Development · Inventors: Kirkman, Todd A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heater formed of multiple layers with at least two envelope layers sealed to each other to form a closed envelope and with at least one of the layers within the sealed envelope layers comprising a gas permeable internal ground member that permit one to neat seal the envelope layers to each other and prevents destruction of the heater if the heater accidentally exceeds a critical operating temperature.
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
- Filed February 7, 2005 and granted May 21, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.