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. 24, 2002
Filed:
Nov. 17, 1999
Fredrick Anvia, Costa Mesa, CA (US);
John A. Elton, Irvine, CA (US);
Femtometrics, Inc., Irvine, CA (US);
Abstract
An apparatus for detecting chemicals in a fluid includes a preconcentrator tube connected to a bi-directional pump and to a detector. The preconcentrator tube contains a sorbent material in thermal contact with a heating element. The bi-directional pump pumps fluid in a first direction through the sorbent material, thereby causing some of the chemicals to accumulate on one side of the sorbent material. The bi-directional pump is reversed so as to pump fluid in a second opposite direction, thereby causing the accumulated chemicals to be carried to the detector. The sorbent material is heated while the bi-directional pump is reversed. Preferably, the detector is equipped with a separate pump that draws fluid to the detector.