Prevention of deposits on ceramics
US7377983B2 · kind B2 · utility
0Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | May 6, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method to prevent deposits on a ceramic surface comprising: (1) pretreating the surface by applying an aqueous solution containing from about 200 ppm to about 1000 ppm by weight of an amphoteric fluorosurfactant, and (2) periodically applying an aqueous maintenance solution comprising from about 1 ppm to about 200 ppm of at least one of an amphoteric or cationic fluorosurfactant or a mixture thereof, from about 5 ppm to about 100 ppm of a sequestering acid, and from about 2.5 ppm to about 200 ppm of a quaternary ammonium biocide compound, wherein all concentrations are by weight of aqueous solution is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.