Steel sheet
US11180835B2 · kind B2 · utility
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Key dates
| Filing date | Sep 25, 2015 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Mar 6, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/36
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A steel sheet has a predetermined chemical composition, and a surface exhibits an absorption peak at which a reflectance is not less than 50% nor more than 85% in a range of wave numbers of 1200 cm−1 to 1300 cm−1 by a Fourier transform-infrared spectroscopy analysis by a reflection absorption spectrometry method, and does not exhibit an absorption peak in a range of wave numbers of 1000 cm−1 to 1100 cm−1, or exhibits an absorption peak at which a reflectance is 85% or more in the range of wave numbers of 1000 cm−1 to 1100 cm−1, wherein Ni of 3 mg/m2 to 100 mg/m2 adheres to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.