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:
Jun. 05, 2007
Filed:
May. 28, 2002
Nikola Anastasijevic, Altenstadt, DE;
Karl-heinz Daum, Wiesbaden, DE;
Wolfram Schalk, Neu-Anspach, DE;
Stefan Laibach, Geismar/Rhön, DE;
Nikola Anastasijevic, Altenstadt, DE;
Karl-Heinz Daum, Wiesbaden, DE;
Wolfram Schalk, Neu-Anspach, DE;
Stefan Laibach, Geismar/Rhön, DE;
Outokumpu Oyj, Espoo, FI;
Abstract
To protect a plate-type heat exchanger () against corrosion due to the attack of sulfuric acid, it is proposed in accordance with the invention that the region through which flows sulfuric acid has at least one metal cathode () and one reference electrode (), that at least half the metal plates () have an electric contact () which is connected with the anode () of an electric d.c. voltage source of variable electric voltage, that the metal cathode () likewise is electrically connected with the d.c. voltage source, and that the d.c. voltage source belongs to a potentiostat () which is electrically connected with the reference electrode ().