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. 30, 2005
Filed:
Sep. 30, 2003
Daniel Sobek, Portola Valley, CA (US);
Hongfeng Yin, Cupertino, CA (US);
Roy D. Rocklin, Sunnyvale, CA (US);
Kevin Killeen, Palo Alto, CA (US);
Daniel Sobek, Portola Valley, CA (US);
Hongfeng Yin, Cupertino, CA (US);
Roy D. Rocklin, Sunnyvale, CA (US);
Kevin Killeen, Palo Alto, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
The fluid flow rate within a microfluidic passageway of a microfabricated device is determined by measuring the time-of-flight of a heat pulse coupled into the fluid. Since the propagation velocity of the heat trace is generally slower than the mean flow rate of the flow, additional processing provides the appropriate scaling needed to obtain an accurate fluid flow rate measurement. The scaling factor is based on the geometry of the structure and the thermal properties of the fluid and the materials used for the device.