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:
Jul. 01, 2008
Filed:
Dec. 14, 2001
Bernd Wenderoth, Birkenau, DE;
Ladislaus Meszaros, Mutterstadt, DE;
Stefan Dambach, Haβloch, DE;
Uwe Fidorra, Wachenheim, DE;
Marco Bergemann, Hockenheim, DE;
Bernd Wenderoth, Birkenau, DE;
Ladislaus Meszaros, Mutterstadt, DE;
Stefan Dambach, Haβloch, DE;
Uwe Fidorra, Wachenheim, DE;
Marco Bergemann, Hockenheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to antifreeze concentrates for cooling systems in fuel cell drives, from which are produced ready-to-use aqueous cooling agent compositions having a maximum conductivity of 50 μs/cm, based on alkylene glycols or the derivatives thereof, and containing orthosilicic acid esters of formula (I) wherein the variables Rto Rare the same or different and represent C-Calkyl substituents, C-Calkenyl substituents, C-Chydroxyalkyl substituents, optionally substituted C-Caryl substituents and/or glycol ether substituents of formula (CH—CH—O)—Rwherein Rrepresents hydrogen or C-Calkyl and n represents a number between 1 and 5