Ultraphobic surface for high pressure liquids
US6852390B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2003 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Jun 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A durable ultraphobic surface that is capable of retaining ultraphobic properties at liquid pressures of one atmosphere and above. The surface generally includes a substrate portion with a multiplicity of projecting regularly shaped microscale or nanoscale asperities disposed so that the surface has a predetermined contact line density measured in meters of contact line per square meter of surface area equal to or greater than a contact line density value “ΛL” determined according to the formula: where γ is the surface tension of the liquid in Newtons per meter, θa,0 is the experimentally measured true advancing contact angle of the liquid on the asperity material in degrees, and ω is the asperity rise angle in degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.