Quartz substrate heater
CA 2308422 C · Owner: Ptasienski, Kevin · Inventors: Lake, Robin H.; Kreisel, James H.; Ptasienski, Kevin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric, resistance element heater utilizes quartz as a sheath material and has a resistance (heating) element that is in intimate substantially , continuous contact with a surface of the quartz. This allows the heater to operate in any one or all of the three modes of heat transfer namely, radiation, conduction and convection. Such intimate substantially continuous , contact of the resistance element is achieved by applying the element in direct contact with the quartz surface. This is accomplished by applying a heating circuit directly to the quartz surface which heating element can be a , foil element or a thick or a thin film deposition element. The overall heater is formed by …
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 November 6, 1998 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2020.
- 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.