Patent US2940832A successfully refreshed from Google Patents.
US2940832A
Expired / Lapsed
US
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Method for synthesizing chromium hexacarbonyl
Assignee: Individual
•
Filing: 1958-01-28
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Granted: 1960-06-14
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Expires: 1978-01-28
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Calderazzo Fausto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:25
CPC Classifications
C; C07; C07F; C07F11/00; C07F11/005; C01; C01G; C01G37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS FOR THE SYNTHESIS OF CHROMIUM HEXACARBONYL, WHICH PROCESS COMPRISES TREATING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF BIVALENT AND TRIVALENT CHROMIUM COMPOUNDS WITH A GAS COMPRISING CARBON MONOXIDE AND WITH A REDUCING AGENT CONSISTING OF A MIXTURE OF (A) A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE METALS MG, ZN AND AL, THE HYDRIDES OF SAID METALS, AND THE ALKYL HYDRIDES OF SAID METALS WITH (B) AN ELECTRON-DONOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES, PYRIDINES AND AMMONIA, IN THE PRESENCE OF AT LEAST ONE ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF HALOGENS, HYDROCARBON HALIDES AND METAL HALIDES, AND SEPARATING THE RESULTING CHAROMIUM HEXACARBONYL FROM THE CRUDE REACTION PRODUCT RESULTING FROM SUCH TREATMENT OF THE STARTING BIVALENT AND TRIVALENT CHROMIUM COMPOUND.
Claim 2
Dependent Claim
127 words
A PROCESS FOR THE SYNTHESIS OF CHROMIUM HEXACARBONYL, WHICH PROCESS COMPRISES TREATING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF BIVALENT AND TRIVALENT CHROMIUM COMPOUNDS WITH A GAS COMPRISING CARBON MONOXIDE AND WITH A REDUCING AGENT CONSISTING OF A MIXTURE OF (A) A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE METALS MG, ZN AND AL, THE HYDRIDES OF SAID METALS, AND THE ALKYL HYDRIDES OF SAID METALS WITH (B) AN ELECTRON-DONOR COMPOUND SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES, PYRIDINES AND AMMONIA, IN THE PRESENCE OF AT LEAST ONE ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF HALOGENS, HYDROCARBON HALIDES AND METAL HALIDES, AND SEPARATING THE RESULTING CHAROMIUM HEXACARBONYL FROM THE CRUDE REACTION PRODUCT RESULTING FROM SUCH TREATMENT OF THE STARTING BIVALENT AND TRIVALENT CHROMIUM COMPOUND.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |