Patent US3152157A successfully refreshed from Google Patents.
US3152157A
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Preparation of cyclopentadienyl compounds of groups iiia, iiib, vb and vib metals
Assignee: Ethyl Corp
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Filing: 1954-03-22
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Granted: 1964-10-06
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Expires: 1974-03-22
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
2026-10-31 16:37
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/02; C07F17/00; C07F5/00; C07F5/003; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/305; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A PROCESS FOR THE MANUFACTURE OF CYCLOPENTADIENYL MOIETY-CONTAINING COMPOUNDS OF THE METAL AND METALLOID ELEMENTS OF GROUP VIB COMPRISING REACTING CYCLOPENTADIENYL ALKALI METAL COMPOUNDS WITH A HALIDE SALT OF ONE OF THE METAL AND METALLOID ELEMENTS OF GROUP VIB.
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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |