Process for making substituted carboxylic acids and derivatives thereof
CA 1320965 C · Owner: Lesuer, William Monroe · Inventors: Lesuer, William Monroe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: IMPROVED PROCESS FOR MAKING SUBSTITUTED CARBOXYLIC ACIDS AND DERIVATIVES THEREOF ABSTRACT OF THE DISCLOSURE, An improvement in known processes for preparing substituted carboxylic acids useful as acylating agents which comprise reacting (A) at least one aliphatic polymer of one or more lower olefins with (B) an acidic reactant selected from the group consisting of fumaric acid, itaconic acid maleic acid, and the corresponding anhydrides lower alkyl esters, acyl chlorides and acyl bromides in the presence of, chlorine can be improved by the steps of (i) reacting at a temperature of about 100°-200°C, a mixture of (A) and (B) in the presence of about 0.05 to 0.15 equivalent of chlorine …
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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 August 3, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 3, 2010.
- 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.