Patent US3734774A successfully refreshed from Google Patents.
US2948744A
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Process for the preparation of cyclopentadienyl manganese tricarbonyl
Assignee: Ethyl Corp
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Filing: 1957-06-12
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Granted: 1960-08-09
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Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Vincent F Hnizda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:46
CPC Classifications
C; C07; C07F; C07F13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PREPARATION OF A MONOMERIC CYCLOPENTADIENYL MANGANESE TRICARBONYL, SAID PROCESS BEING CHARACTERIZED BY HEATING TO A TEMPERATURE BETWEEN ABOUT 100 AND 300*C. A LIQUID MIXTURE OF DIMERIC MANGANESE PENTACARBONYL WITH AN EXCESS OF THE DIMER OF A CYCLOPENTADIENE SELECTED FROM THE CLASS CONSISTING OF UNSUBSITUTED AND MONOALKYL SUBSTITURED CYCLOPENTADIENES IN WHICH THE ALKYL GROUP HAS UP TO 4 CARBON ATOMS, TO CAUSE THE MATERIALS TO REACT AND FORM SAID MONOMERIC COMPOUNDS.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PREPARATION OF A MONOMERIC CYCLOPENTADIENYL MANGANESE TRICARBONYL, SAID PROCESS BEING CHARACTERIZED BY HEATING TO A TEMPERATURE BETWEEN ABOUT 100 AND 300*C. A LIQUID MIXTURE OF DIMERIC MANGANESE PENTACARBONYL WITH AN EXCESS OF THE DIMER OF A CYCLOPENTADIENE SELECTED FROM THE CLASS CONSISTING OF UNSUBSITUTED AND MONOALKYL SUBSTITURED CYCLOPENTADIENES IN WHICH THE ALKYL GROUP HAS UP TO 4 CARBON ATOMS, TO CAUSE THE MATERIALS TO REACT AND FORM SAID MONOMERIC COMPOUNDS.
References Cited (Backward Citations)
US2818416A
Cited
US2810736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |