Process of manufacturing diaryl esters of dicarboxylic acids
CA 1198446 A · Owner: Occidental Chemical Corporation · Inventors: Ranade, Gautam R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for preparing diaryl esters of a monohydroxy aromatic compound with dicarboxylic acids is disclosed, in which the esterification reaction is optimized by continuous removing water and/or other by-products of the reaction from the reactor, while supplying to the reactor a make-up amount of the monohydroxy aromatic compound containing no more than about 100 ppm of water. The make-up stream may be obtained by stripping the by-product stream of water and other by-products of the reaction.
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 December 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 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.