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:
Sep. 30, 2003
Filed:
Mar. 30, 2000
Hans-Georg Weissgerber, Straubenhardt, DE;
Hans-Peter Zimmermann, Karlsruhe, DE;
Andreas Lorinser, Waldbronn, DE;
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
Volume flows of liquids in capillary tubes of chromatographic separation columns for analytical liquid measuring technology are controlled. The volume flows are derived from a liquid transport, i.e., pump arrangement, which transports a total flow to a flow splitter that divides the total flow into an excess flow in an excess path and a working flow in a working path. A controller for the working flow responds to at least one working sensor. The working sensor senses the mass flow rate of the working flow and/or the pressure in the working path which is coupled with the working sensor or the pressure differential in conduits for the excess and working flows.