Carbothermal production of alkali metals
CA 2213311 A1 · Owner: Yao, Chengcai · Inventors: Epstein, Michael; Yogev, Amnon; Yao, Chengcai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Production of metallic sodium and potassium by reaction of their hydroxides or carbonates with carbon. The carbon may be produced in situ by pyrolysis of a pyrolyzable carbonaceous material. There are further disclosed a process and installation for performing the production while using solar energy.
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 August 19, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2019.
- 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.