Process for the production of thiotetronic acid
CA 1264472 C · Owner: Meul, Thomas · Inventors: Tenud, Leander; Meul, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for the production of thiotetronic acid, in which 4-chloro-4-chloromethyloxetan-2one is reacted directly with hydrogen sulfide in the presence of an amine to produce thiotetronic acid. Alternatively the reaction mixture is converted prior to isolation of the thiotetronic acid with ketene and the conversion product is converted with a mineral acid in order to obtain the thiotetronic acid.
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 January 16, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 2007.
- 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.