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:
Oct. 21, 2014
Filed:
Feb. 18, 2011
Michael Waidelich, Burghausen, DE;
Achim Stankowiak, Altoetting, DE;
Johann Schuster, Kastl, DE;
Martina Unterhaslberger, Neuoetting, DE;
Sabine Dronia, Kastl, DE;
Michael Waidelich, Burghausen, DE;
Achim Stankowiak, Altoetting, DE;
Johann Schuster, Kastl, DE;
Martina Unterhaslberger, Neuoetting, DE;
Sabine Dronia, Kastl, DE;
Clariant Finance (BVI) Limited, Tortola, VG;
Abstract
Biodegradable, frost proof heat-transfer fluid, use thereof in near-surface geothermal installations, and a concentrate: subject matter of the present invention is the use of a triazole-free composition which as well as water comprises a) 9.2% to 49.5% by weight of at least one Cto Calkylene glycol, Cto Cpolyalkylene glycol or glycerol, b) 0.1% to 4% by weight of at least one corrosion inhibitor, with the provisos that c) the composition is readily degradable biologically in accordance with test method OECD 301 A, d) the composition has an anaerobic biodegradability of at least 75% in accordance with test method OECD 311, e) the corrosion inhibitor or all corrosion inhibitors used are readily degradable biologically in accordance with OECD 301 A (for water-soluble corrosion inhibitors) or OECD 301 B (for corrosion inhibitors of low water-solubility), in near-surface geothermal installations as a heat-transfer fluid.