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:
Jul. 10, 2012
Filed:
Sep. 05, 2008
Terry A. Berger, Englewood, FL (US);
Kimber D. Fogelman, Hockessin, DE (US);
Edwin E. Wikfors, Landenberg, PA (US);
L. Thomson Staats, Iii, Oxford, PA (US);
Samuel O. Colgate, Gainesville, FL (US);
Michael A. Casale, Hockessin, DE (US);
Terry A. Berger, Englewood, FL (US);
Kimber D. Fogelman, Hockessin, DE (US);
Edwin E. Wikfors, Landenberg, PA (US);
L. Thomson Staats, III, Oxford, PA (US);
Samuel O. Colgate, Gainesville, FL (US);
Michael A. Casale, Hockessin, DE (US);
Aurora SFC Systems, Inc., Redwood City, CA (US);
Abstract
An invention is claimed that enables the pumping of compressible fluids at high pressures when an accurate flow is desired. Two pressure sources, for example pumps plumbed in series, separate thermodynamic work, such as pressurization, at the first pressure source from a volumetric or matter metering function in the second pressure source. One example is a flowstream delivery for a chemical instrumentation system that is manufactured from relatively unsophisticated pumps yet delivers precise flows with low pulsation (<1%) over pressures greater than 100 bar. An advantage of one embodiment allows the economical conversion of typical HPLC systems to state of-the-art supercritical fluid chromatography (SFC) systems with minimal modification to system components.