US2987531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cyclopentadienyl manganese compounds from tris (cyclopentadienyl) group iii-a metal compounds
Assignee: Ethyl Corp
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Filing: 1958-04-25
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Granted: 1961-06-06
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Expires: 1978-04-25
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Hymin
- 👤 Witt Earl G De
- 👤 Jerome E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:43
CPC Classifications
C; C07; C07F; C07F17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS OF MAKING CYCLOPENTADIENYL MANGANESE COMPOUNDS COMPRISING REACTING AT A TEMPERATURE BETWEEN ABOUT 0-250*C. A MANGANESE SALT WITH A TRIS(CYCLOPENTADIENYL HYDROCARBON) GROUP IIIA METAL HAVING THE CYCLOPENTADIENYL MOIETIES EACH BONDED DIRECTLY TO THE METAL THROUGH A CARBON COMPRISING THE CYCLOPENTADIENYL RING.
Claim 2
Dependent Claim
42 words
THE PROCESS OF MAKING CYCLOPENTADIENYL MANGANESE COMPOUNDS COMPRISING REACTING AT A TEMPERATURE BETWEEN ABOUT 0-250*C. A MANGANESE SALT WITH A TRIS(CYCLOPENTADIENYL HYDROCARBON) GROUP IIIA METAL HAVING THE CYCLOPENTADIENYL MOIETIES EACH BONDED DIRECTLY TO THE METAL THROUGH A CARBON COMPRISING THE CYCLOPENTADIENYL RING.
References Cited (Backward Citations)
BE540135A
Cited
US2839552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |