Patent US2964548A successfully refreshed from Google Patents.
US2964548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of cyclomatic manganese compounds
Assignee: Ethyl Corp
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Filing: 1959-08-05
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Granted: 1960-12-13
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Expires: 1979-08-05
Abstract
No abstract record available.
Inventors
- 👤 Jerome E Brown
- 👤 Witt Earl G De
- 👤 Shapiro Hymin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:16
CPC Classifications
C; C07; C07F; C07F17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS FOR THE PREPARATION OF HYDROCARBON CYCLOMATIC MANGANESE COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
A PROCESS FOR THE PREPARATION OF HYDROCARBON CYCLOMATIC MANGANESE COMPOUNDS HAVING THE GENERAL FORMULA
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |