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:
Aug. 19, 2014
Filed:
Aug. 08, 2011
Richard M. White, Berkeley, CA (US);
Igor Paprotny, Berkeley, CA (US);
Frederick Doering, Hayward, CA (US);
Richard M. White, Berkeley, CA (US);
Igor Paprotny, Berkeley, CA (US);
Frederick Doering, Hayward, CA (US);
University of California, Berkeley, CA (US);
Abstract
An apparatus for measuring concentrations of airborne particulate matter may include, in one embodiment, a primary channel to receive air samples from the external environment. The air samples include particles of varying sizes. A microfluidic circuit communicates with the primary channel and small particles (having a size less than a threshold size) are diverted around a bend into a secondary channel. Remaining larger particles are unable to make the bend and continue through the primary channel. A mass-sensitive element communicating with the secondary channel includes a collection surface to collect the small particles. A resonant frequency of the mass-sensitive element is reduced in proportion to the mass of the particles collected.