Process for producing 2-amino-5-mercapto-1,2,3- thiadiazoles
CA 1182461 A · Owner: Degussa Aktiengesellschaft · Inventors: Klenk, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2-amino-5-mercap-to-1,3,4-thiadiazoles can be produced in very high yields, from thiosemicarbazides and carbon disulphide in aqueous phase when the reaction is carried out in the presence of the corresponding ammonium salts of bis-2,5-mercapto- 1,3,4-thiadiazoles at temperatures above 40°C. The reaction is carried out preferably in the presence of the mother liquor of preceding reactions.
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 February 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 2002.
- 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.