Purification of chlorine gas
CA 1086922 A · Owner: Asahi Glass Company Ltd. · Inventors: Nakaya, Keiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crude chlorine gas is purified by cooling the crude chlorine gas in the presence of water so as to crystallize chlorine in the crude chlorine gas as chlorine hydrate crystals and separating the other components of the crude chlorine gas from chlorine hydrate crystals and then, decomposing the chlorine hydrate crystals to obtain chlorine gas.
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
- Granted October 7, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 1997.
- 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.