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. 03, 1996
Filed:
May. 23, 1994
Francis P Liu, State College, PA (US);
Supelco, Inc., Bellefonte, PA (US);
Abstract
A reagent, an apparatus and a method for semi-quantitatively estimating the concentration of readily oxidizable organic vapors in a gas sample, as for example ethanol in a human breath sample, is disclosed. The ethanol-sensitive solid indicator is a solid support which contains a permanganate salt and is wetted by a strongly acidic or alkaline solution. In the presence of ethanol the indicator produces a clearly visible color change. The apparatus contains the indicator and provides a pathway for a gas sample through the indicator. The method allows estimation of the organic-vapor content of a gas sample by comparing the volume of indicator which changes color in response to the gas sample with the volume which changes color in response to a known-concentration standard.