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. 20, 2005
Filed:
Jun. 19, 2002
Richard Chang, Hamden, CT (US);
Yong-le Pan, Cheshire, CT (US);
Ronald Gene Pinnick, Columbia, MD (US);
Steven Clyde Hill, Silver Spring, MD (US);
Richard Chang, Hamden, CT (US);
Yong-Le Pan, Cheshire, CT (US);
Ronald Gene Pinnick, Columbia, MD (US);
Steven Clyde Hill, Silver Spring, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A Fluorescence Particle Spectrometer (FPS) performs real-time measurement of the fluorescence spectra of aerosol particles in the size range 1-10 μm diameter. The FPS has a sufficiently high sample rate (estimated to be a few liters/min) to measure aerosol within buildings (from 1 up to 600 particle fluorescence spectra per minute) at practical rates. A virtual impactor first concentrates aerosol particles, which are then drawn under negative pressure through an aerodynamic focusing nozzle in the inlet of the instrument, through the sample region, providing further concentration. The rate of particle spectra measured by the FPS increases significantly when the particle inlet is within a few meters of some common sources of indoor biological particles.