Additive for quality determination of conversion coatings
US11807779B2 · kind B2 · utility
0Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Jul 8, 2021 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Oct 7, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2222/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of applying a trivalent chromium or chromium-free conversion coating to a metallic substrate including mixing a dye compound that interacts with electromagnetic radiation outside the human visual spectrum but not electromagnetic radiation that is within the human visual spectrum to produce an observable emission into the trivalent chromium or chromium-free conversion coating mixture to allow for inspection of the coating after applied with a correlating electromagnetic radiation source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.