Surface treatment to passivate sublimation surfaces to hydrophobic contaminants
US9227379B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | May 17, 2012 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Dec 8, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C28/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The sublimation capability of a porous metal plate used in a sublimator is maintained by heating the porous metal plate at an elevated temperature in a flowing stream of oxygen for an extended period of time to form an oxidized surface. A short chain molecule, such as citric acid, is attached to the oxidized surface having multiple functional carboxylate groups and no hydrophobic tail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.