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.:

US 7923252 B1

PDF
Full Text
Expired
Date of Patent:
Apr. 12, 2011

Filed:

Feb. 28, 2005
Applicant:

Ger Van Den Engh, Seattle, WA (US);

Inventor:

Ger Van den Engh, Seattle, WA (US);

Assignee:

University of Washington, Seattle, WA (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/85 (2006.01); G01N 33/48 (2006.01);
U.S. Cl.
CPC ...
Abstract

A droplet forming flow cytometer system () allows high speed processing without the need for high oscillator drive powers through the inclusion of an oscillator or piezoelectric crystal () within the nozzle volume () and directly coupled to the sheath fluid. The nozzle container () continuously converges so as to amplify unidirectional oscillations () which are transmitted as pressure waves through the nozzle volume () to the nozzle exit so as to form droplets from the fluid jet. A variation in substance concentration is achieved through a movable substance introduction port () which is positioned within a convergence zone () to vary the relative concentration of substance to sheath fluid while still maintaining optimal laminar flow conditions. This variation may be automatically controlled through a sensor and controller configuration.


Find Patent Forward Citations

Van den Engh, Ger. (2011). Droplet formation systems for flow cytometers (U.S. Patent No. 7923252). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7923252

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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