Patent US2916506A successfully refreshed from Google Patents.
US2916506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cyclopentadienylmanganese compounds
Assignee: Ethyl Corp
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Filing: 1957-11-22
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Granted: 1959-12-08
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Expires: 1977-11-22
Abstract
No abstract record available.
Inventors
- 👤 William R Axtell
- 👤 Bingeman J Byron
- 👤 Albert P Giraitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
C; C07; C07F; C07F13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE PROCESS OF SEPARATING MIXTURES OF CYCLOPENTADIENYL MANGANESE TRICARBONYL IN WHICH THE CYCLOPENTADIENYL MOIETY IS A HYDROCARBON GROUP HAVING FROM 5-13 CARBON ATOMS AND A CYCLOPENTADIENE HYDROCARBON HAVING FROM 5-13 CARBON ATOMS SAID HYDROCARBON BEING IN POLYMERIC FORM, COMPRISING HEATING SAID MIXTURE TO A TEMPERATURE OF SAID CYCLOPENTADEINYL MANAGANESE TRITION TEMPERATURE OF SAID CYCLOPENTADIENYL MANGANESE TRICARBONYL TO THERMALLY STABILIZE SAID MIXTURE AND FRACTIONATING SAID STABILIZED MIXTURE TO SEPARATE THE CYCLOPENTADIENE HYDROCARBON FROM SAID CYCLOPENTADIENYL MAN-GANESE TRICARBONYL.
Claim 2
Dependent Claim
76 words
THE PROCESS OF SEPARATING MIXTURES OF CYCLOPENTADIENYL MANGANESE TRICARBONYL IN WHICH THE CYCLOPENTADIENYL MOIETY IS A HYDROCARBON GROUP HAVING FROM 5-13 CARBON ATOMS AND A CYCLOPENTADIENE HYDROCARBON HAVING FROM 5-13 CARBON ATOMS SAID HYDROCARBON BEING IN POLYMERIC FORM, COMPRISING HEATING SAID MIXTURE TO A TEMPERATURE OF SAID CYCLOPENTADEINYL MANAGANESE TRITION TEMPERATURE OF SAID CYCLOPENTADIENYL MANGANESE TRICARBONYL TO THERMALLY STABILIZE SAID MIXTURE AND FRACTIONATING SAID STABILIZED MIXTURE TO SEPARATE THE CYCLOPENTADIENE HYDROCARBON FROM SAID CYCLOPENTADIENYL MAN-GANESE TRICARBONYL.
References Cited (Backward Citations)
US2818417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |