Expired Canadian patentCanada
Process for producing maleic acid
CA 2283206 C · Owner: Dethloff, Christian · Inventors: Barbarino, Sergio; Dethloff, Christian
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for producing maleic acid with close control of the temperature for optimum conversion of maleic anhydride into maleic acid and minimal production of fumaric 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
- Filed March 6, 1998 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 6, 1998
GrantedDecember 23, 2003
Term endedMarch 6, 2018
Patent numberCA 2283206 C
Classification (IPC)C07C57/02 +2 more
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.