Gas quenching method using a recycling facility
CA 2535530 C · Owner: Lefevre, Linda · Inventors: Chaffotte, Florent; Delobel, Olivier; Blanchard, Nicolas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a gas quenching method of the type that makes use of (i) a quenching cell (V1) which is intended to receive objects to be quenched with a quenching gas and (ii) a buffer capacity (V2) which is designed to contain the quenching gas. The invention is characterised in that following a quenching operation all or part of the gas contained in the cell (V1) is recycled in the following manner consisting in: obtaining a first intermediate storage balloon (V3) which can receive the quenching gas from the cell; after a quenching operation performing one or more operations comprising the partial emptying of the contents of the cell (V1) into the first intermediate storage …
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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 August 10, 2004 and granted May 22, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2026.
- 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.