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:
Sep. 02, 2008
Filed:
Jun. 08, 2006
Bernd Wenderoth, Birkenau, DE;
Stefan Dambach, Haβloch, DE;
Ladislaus Meszaros, Mutterstadt, DE;
Uwe Fidorra, Wachenheim, DE;
Bernd Wenderoth, Birkenau, DE;
Stefan Dambach, Haβloch, DE;
Ladislaus Meszaros, Mutterstadt, DE;
Uwe Fidorra, Wachenheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
An antifreeze concentrate for cooling systems in fuel-cell drives which gives ready-to-use aqueous coolant compositions having a conductivity of at most 50 μS/cm, based on alkylene glycols or derivatives thereof and containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring.