US2968636A
Expired / Lapsed
US
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Method of producing an iron oxidechromium oxide complex
Assignee: COULEURS DE PROVENCE SOC D
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Filing: 1957-11-19
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Granted: 1961-01-17
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Expires: 1977-11-19
Abstract
No abstract record available.
Inventors
- 👤 Sciallano Clement
- 👤 Carles Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J23/868
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF PREPARING COMPLEX IRON-CHROMIUM MIXTURES CONSISTING ESSENTIALLY OF SUSPENDING MONOHYDROUS FERRIC OXIDE IN AN AQUEOUS FERROUS SALT SOLUTION, ADDING METALLIC IRON AND A SOLUBLE CHROMIUM SALT TO THE SOLUTION, MAINTAINING THE PH OF THE SOLUTION BETWEEN ABOUT 3-4 AND THE TEMPERATUE OF THE SOLUTION BETWEEN ABOUT 55-65* C., AND OXIDIZING THE SOLUTION TO DEPOSIT THE CHROMIUM ON THE MONOHYDROUS FERRIC OXIDE.
Claim 2
Independent Claim
63 words
A METHOD OF PREPARING COMPLEX IRON-CHROMIUM MIXTURES CONSISTING ESSENTIALLY OF SUSPENDING MONOHYDROUS FERRIC OXIDE IN AN AQUEOUS FERROUS SALT SOLUTION, ADDING METALLIC IRON AND A SOLUBLE CHROMIUM SALT TO THE SOLUTION, MAINTAINING THE PH OF THE SOLUTION BETWEEN ABOUT 3-4 AND THE TEMPERATUE OF THE SOLUTION BETWEEN ABOUT 55-65* C., AND OXIDIZING THE SOLUTION TO DEPOSIT THE CHROMIUM ON THE MONOHYDROUS FERRIC OXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |