US2548728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of nickel carbonyl
Assignee: Rohm and Haas Co
•
Filing: 1949-05-04
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Granted: 1951-04-10
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Expires: 1969-05-04
Abstract
No abstract record available.
Inventors
- 👤 John F Kincaid
- 👤 James S Strong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:06
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF PREPARING NICKE L CARBONYL WHICH COMPRISES BRINGING CARBON MONOXIDE INTO INTIMATE CONTACT, AT A TEMPERATURE OF 50* C. TO 200* C. AND UNDER A PRESSURE IN EXCESS OF 1000 LBS. PER SQUARE INCH, WITH AN ALKALINE, AQUEOUS SLURRY OF A FRESHLY PRECIPITATED HYDRATED NICKEL OXIDE, PREPARED BY MIXING IN WATER A WATERSOLUBLE NICKEL SALT AND A MEMBER OF THE CLASS CONSISTING OF ALKALI AND ALKALINE EARTH METAL HYDROXIDES, SAID SLURRY BEING MAINTAINED AT AN ALKALINE PH OF AT LEAST 7.5 AND CONTAINING CYANIDE IONS IN AN AMOUNT EQUAL TO 2.5 TO 25 MOLE PER CENT BASED ON THE WEIGHT OF SAID HYDRATED NICKEL OXIDE, AND THEREAFTER ISOLATING THE RESULTANT NICKEL CARBONYL.
Claim 2
Dependent Claim
114 words
THE PROCESS OF PREPARING NICKE L CARBONYL WHICH COMPRISES BRINGING CARBON MONOXIDE INTO INTIMATE CONTACT, AT A TEMPERATURE OF 50* C. TO 200* C. AND UNDER A PRESSURE IN EXCESS OF 1000 LBS. PER SQUARE INCH, WITH AN ALKALINE, AQUEOUS SLURRY OF A FRESHLY PRECIPITATED HYDRATED NICKEL OXIDE, PREPARED BY MIXING IN WATER A WATERSOLUBLE NICKEL SALT AND A MEMBER OF THE CLASS CONSISTING OF ALKALI AND ALKALINE EARTH METAL HYDROXIDES, SAID SLURRY BEING MAINTAINED AT AN ALKALINE PH OF AT LEAST 7.5 AND CONTAINING CYANIDE IONS IN AN AMOUNT EQUAL TO 2.5 TO 25 MOLE PER CENT BASED ON THE WEIGHT OF SAID HYDRATED NICKEL OXIDE, AND THEREAFTER ISOLATING THE RESULTANT NICKEL CARBONYL.
References Cited (Backward Citations)
GB327956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |