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. 23, 2006
Filed:
Jun. 18, 2003
Terry A. Berger, Newark, DE (US);
Kimber D. Fogelman, Hockessin, DE (US);
Kenneth Klein, Newark, DE (US);
L. Thompson Staats, Iii, Lincoln University, PA (US);
Mark Nickerson, Landenburg, PA (US);
Paul F. Bente, Iii, Landenburg, PA (US);
Terry A. Berger, Newark, DE (US);
Kimber D. Fogelman, Hockessin, DE (US);
Kenneth Klein, Newark, DE (US);
L. Thompson Staats, III, Lincoln University, PA (US);
Mark Nickerson, Landenburg, PA (US);
Paul F. Bente, III, Landenburg, PA (US);
Mettler-Toledo AutoChem, Inc., Millersville, MD (US);
Abstract
The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprises a pressure regulation assembly installed downstream from a compressible fluid pump but prior to combining the compressible flow with a relatively incompressible modifier flow stream. The present invention allows the replacement of an high-grade SFC pump in the compressible fluid flow stream with an inexpensive and imprecise pump. The imprecise pump becomes capable of moving the compressible fluid flow stream in a precise flow rate and pattern. The assembly dampens the damaging effects of an imprecise pump, such as large pressure oscillations caused by flow ripples and noisy pressure signals that do not meet precise SFC pumping requirements.