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. 28, 2002
Filed:
May. 22, 2000
Michael Markelov, Chesterland, OH (US);
Other;
Abstract
A headspace sampling apparatus ( ) operates to provide a sample of a vapor phase of a substance being analyzed under conditions of thermodynamic equilibrium. The substance is held in a vial ( ). The vapor phase of the substance ( ) is moved through a sample loop ( ) between a first variable volume chamber ( ) and a second variable volume chamber ( ). A constant volume and temperature is maintained within the variable volume chambers, the sample loop and the headspace of the vial. An aliquot of the equilibrated vapor in the sample loop is passed to an analytical instrument ( ) for analysis. The sample is obtained under conditions in which the sampling process does not affect the makeup of the sample because thermodynamic equilibrium is maintained.