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:
May. 31, 1988
Filed:
Mar. 19, 1981
Applicant:
Inventors:
Wolfgang Fischer, Darmstadt, DE;
Karl-Dieter Krenn, Pfungstadt, DE;
Assignee:
Riedel-de Haen AG, Seelze, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436 42 ; 204 / ;
Abstract
A pyridine-free Karl-Fischer reagent for the determination of water which comprises (a) a solvent solution containing sulfur dioxide and an amine in a Karl-Fischer reagent solvent, the amine being functionally equivalent to pyridine in a Karl-Fischer reagent, and (b) a titrating agent containing iodine in a Karl-Fischer solvent; the molar ratio of amine to sulfur dioxide being about 2:1 to about 1:1 and the reagent being essentially free of pyridine.