Method of manufacturing lithium sulfide
CA 2202585 A1 · Owner: Furukawa Co. Ltd. · Inventors: Yamamoto, Kazutomi; Ikeda, Nobuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lithium sulfide can be manufactured by the reaction between lithium hydroxide and gaseous sulfur at the temperature of 130 to 445 °C. As lithium hydroxide is solid and raw material as sulfur is gas at this temperature fluidization and mechanical agitation are effective to react solid with gas. It is important to control lithium hydroxide's size in order to react two components smoothly and perfectly.
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 April 14, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 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.