US3787464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of trivalent cobalt complexes
Assignee: SnamProgetti SpA
•
Filing: 1970-12-30
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Granted: 1974-01-22
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Expires: 1990-12-30
Abstract
Abstract A PROCESS IS DISCLOSED FOR PREPARING TRIVALENT COBALT DERIVATIVES OF THE FORMULA 1-((-)O-),2-((2-((-)O-)PHENYL)-CH=N-CH2-CH2-N=CH-)BENZENE X-CH2-(-) CO(+3) WHEREIN X IS NO2, CN. CH3CO OR CHO WHICH COMPRISES REACTING A SUSPENSION OR SOLUTION CONTAINING A DIVALENT COBALT COMPLEX OF THE FORMULA IG-02 METHANOL AND A REACTANT OF THE FORMULA CH3-X WHEREIN, X AS AS DEFINED ABOVE, AT A TEMPERATURE FROM 0*C. TO 80*C. WHILE SIMULTANEOUSLY INTRODUCING OXYGEN GAS INTO SAID SUSPENSION OR SOLUTION.
Inventors
- 👤 C Neri
- 👤 E Perrotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:47
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/06; C07F15/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |