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:
Nov. 23, 1982
Filed:
Jan. 05, 1981
Ross C Ahlstrom, Jr, Lake Jackson, TX (US);
Mark S Johnson, Lake Jackson, TX (US);
Jerry P Moore, Katy, TX (US);
Ivo R Schoppe, Jr, Lake Jackson, TX (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A repetitive gas chromatograph employing a backflush valve downstream from the detector and a separate sample injection valve located upstream located directly upstream from the single chromatographic column. Each valve is operated independently of the other so as to allow flexibility in the timing of going into backflush operation and returning the sample valve immediately after sample injection onto the column to sample passage through the sample valve so as to more quickly establish equilibration of the sample and the sample valve's walls. Type and location of sample valve and backflush valve allow continuous monitoring of a sample stream.