US2865716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of crystalline cobalt tetracarbonyl
Assignee: Eastman Kodak Co
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Filing: 1954-09-01
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Granted: 1958-12-23
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Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:00
CPC Classifications
C; C01; C01G; C01G51/00; C01G51/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF PREPARING CYRSTALLINE COBALT TETRACARBONYL, COMPRISING SUBJECTING A MIXTURE OF A COBALT SALT OF AN ORGANIC CARBOXYLIC ACID HAVING THE FORMULA RCO2H, WHERE R IS SELECTED FROM H, ALKYL, CYCLOALKYL AND ARYL GROUPS FREE OF NON-BENZENOID UNSATURATION AND CONTAINING ONLY CARBON, HYDROGEN AND OXYGEN, WITH A LOWER ALIPHATIC PRIMARY ALCOHOL CONTAINING 2 TO 8 CARBON ATOMS, TO CONTACT WITH A GAS CONSISTING ESSENTIALLY OF CARBON MONOXIDE AT AROUND 200*C. AND ABOVE ABOUT 2000 P.S.I. TO CONVERT A SUBSTANTIAL QUANTITY OF THE COBALT TO COBALT CARBONYL, THEN REDUCING THE TEMPERATURE OF THE MIXTURE TO FORM CRYSTALLINE COBALT TETRACABONYL THEREIN AND RECOVERING CRYSTALLINE COBALT TETRACARBONYL FROM SAID MIXTURE.
Claim 2
Independent Claim
108 words
A METHOD OF PREPARING CYRSTALLINE COBALT TETRACARBONYL, COMPRISING SUBJECTING A MIXTURE OF A COBALT SALT OF AN ORGANIC CARBOXYLIC ACID HAVING THE FORMULA RCO2H, WHERE R IS SELECTED FROM H, ALKYL, CYCLOALKYL AND ARYL GROUPS FREE OF NON-BENZENOID UNSATURATION AND CONTAINING ONLY CARBON, HYDROGEN AND OXYGEN, WITH A LOWER ALIPHATIC PRIMARY ALCOHOL CONTAINING 2 TO 8 CARBON ATOMS, TO CONTACT WITH A GAS CONSISTING ESSENTIALLY OF CARBON MONOXIDE AT AROUND 200*C. AND ABOVE ABOUT 2000 P.S.I. TO CONVERT A SUBSTANTIAL QUANTITY OF THE COBALT TO COBALT CARBONYL, THEN REDUCING THE TEMPERATURE OF THE MIXTURE TO FORM CRYSTALLINE COBALT TETRACABONYL THEREIN AND RECOVERING CRYSTALLINE COBALT TETRACARBONYL FROM SAID MIXTURE.
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |