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:
Jun. 03, 2008
Filed:
May. 30, 2003
Robert J Cotter, Baltimore, MD (US);
Benjamin D Gardner, Colton, CA (US);
Robert J Cotter, Baltimore, MD (US);
Benjamin D Gardner, Colton, CA (US);
The Johns Hopkins Univeristy, Baltimore, MD (US);
Abstract
A time-of-flight mass spectrometer has a first electrode, a second electrode spaced apart from the first electrode, a third electrode arranged between the first and second electrodes. The third electrode reserves a space for ions to travel between the first and second electrodes. The time-of-flight mass spectrometer further includes a sample probe disposed proximate the first electrode and adapted to hold a sample, and a detector disposed proximate the second electrode. The first electrode is adapted to be connected to a voltage source to cause a difference in voltage between the first and second electrodes to provide an electric field therebetween that changes non-linearly along an ion path between the sample probe and the detector for accelerating ions to be detected.