The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2026
Filed:
Jan. 06, 2025
Applicant:
Evonik Oxeno Gmbh & Co. KG, Marl, DE;
Inventors:
Michael Grass, Haltern am See, DE;
Johannes Kraft, Offenbach, DE;
Michael Van Eickels, Recklinghausen, DE;
Sebastian Arndt, Ginsheim Gustavsburg, DE;
Carl-Friedrich Hoppe, Gruendau, DE;
Stephan Becker, Marl, DE;
David Sascha Bremer, Recklinghausen, DE;
Assignee:
Evonik Oxeno GmbH & Co. KG, Marl, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B 3/07 (2021.01); C25B 3/25 (2021.01); C25B 3/29 (2021.01); C25B 11/043 (2021.01);
U.S. Cl.
CPC ...
C25B 3/07 (2021.01); C25B 3/295 (2021.01); C25B 11/043 (2021.01);
Abstract
An electrochemical process produces tetraalkyl 1,2,3,4-butanetetracarboxylates having alkyl groups with 1 to 6 carbon atoms. The process employs an electrohydrodimerization of dialkyl maleates having alkyl groups having 1 to 6 carbon atoms in a reactant solution with an alcohol and a conducting salt.