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:
Oct. 04, 2011
Filed:
Sep. 15, 2006
Charles W. Extrand, Minneapolis, MN (US);
Michael Wright, Portland, OR (US);
Charles W. Extrand, Minneapolis, MN (US);
Michael Wright, Portland, OR (US);
Entegris, Inc., Billerica, MA (US);
Abstract
A fluid handling device with an anisotropic wetting surface including a substrate with a multiplicity of asymmetric substantially uniformly shaped asperities thereon. Each asperity has a first asperity rise angle and a second asperity rise angle relative to the substrate. The asperities are structured to present a desired retentive force ratio (f/f) greater or less than unity caused by asymmetry between the first asperity rise angle and the second asperity rise angle according to the formula: f/f=sin(ω+½Δθ)/sin(ω+½Δθ).