Compositions for making blixes
Abstract
Abstract COMPOSITIONS CONTAINING A SUFFICIENT AMOUNT OF (A) A WATER-SOLUBLE COMPLEX OF A FERRIC ION WITH A PENTADENTATE OR A HEXADENTATE PRIMARY LIGAND TO PRODUCE, WHEN DISSOLVED IN WATER, A SOLUTION CONTAINING FROM ABOUT 0.4 MOLE/LITER TO ABOUT 2.0 MOLES/LITER AND (B) A SUFFICIENT AMOUNT OF A WATER-SOLUBLE MONODENTATE SECONDARY LIGAND, SUCH AS, A THIOCYANATE, A BORATE, BORIC ACID, A FLUORIDE OR A THIOUREA SO THAT THE MOLE RATIO OF THIOCYANTE TO (A) IS AT LEAST 5:1, THE MOLE RATIO OF THE BORATE, BORIC ACID OR FLORIDE TO (A) IS AT LEAST 1:1 AND THE MOLE RATIO OF THE THIOUREA TO (A) IS AT LEAST 3:1 ARE ADVANTAGEOUSLY USED TO PREPARE BLIX SOLUTIONS FOR REMOVING SILVER AND SILVER HALIDE IN COLOR-DEVELOPED PHOTOGRAPHIC PROCESSING.
Inventors
- 👤 Rowland G Mowrey
- 👤 Keith H Stephen
- 👤 Eugene F Wolfarth
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |