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:
Aug. 04, 1992
Filed:
Jan. 30, 1991
John B Phillips, Carbondale, IL (US);
Zaiyou Liu, Provo, UT (US);
The Board of Trustees of Southern Illinois University, Carbondale, IL (US);
Abstract
To provide a compact, sensitive comprehensive, two-dimensional gas chromatograph, a chromatographic column has first and second sections in series with each other to permit the flow of sample and a carrier through the first section and the second section. The retention time of the second section is less than the band resolution time of the first section. To control the wave fronts between the first and second sections, first and second heaters are positioned to heat and drive off sample collected at the outlet of the first section for collection in the second section and to heat sample collected at the inlet of the second section so that the first heater rapidly drives off sample for collection in the second section and then the second section rapidly drives off sample in a sharp wave front while the first section is accumulating another band for later movement into the second section.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile