Blocked pyrazolone magenta dye-forming couplers
UST101004I4 · kind I4 · defensive publication
0Cited by
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5Claims
0Family size
Inventors
Key dates
| Filing date | Dec 29, 1980 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Dec 29, 2000 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.