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. 07, 1994
Filed:
Mar. 10, 1993
Pedro Lilienfeld, Lexington, MA (US);
TRC Companies, Inc., East Hartford, CT (US);
Abstract
A system and method for determining airborne particle concentrations. When in a fixed time period mode of operation, the system determines actual airborne particle concentration when a normal particle count is detected, and determines an 'upper limit' particle concentration based on Poisson statistics when a low particle count is detected. In a fixed precision mode of operation, the system determines in advance the number of particles needed to be detected to achieve an airborne particle concentration measurement having a precision equivalent to a user selected fixed precision, and prints out airborne concentration measurements only when such measurements have the user selected fixed precision.