Process for the production of 4-alkoxy-2(5h) thiophenones
CA 1304386 C · Owner: Meul, Thomas · Inventors: 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 4alkoxy-2(5H) thiophenones of the formula: (I), wherein R1 is straight-chain or branched alkyl having from 1 to 4 carbon atoms. The compounds (I) are suitable as intermediate products, i.e. for the production of highly pure 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 June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- 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.