Patent US4469638A successfully refreshed from Google Patents.
US4469638A
Expired / Lapsed
US
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Production of transition metal complexes
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1983-02-16
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Granted: 1984-09-04
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Expires: 2003-02-16
Abstract
Abstract The invention relates to a process for the production of complex compounds of the transition metals which is characterized in that transition metals are reacted with magnesium, to which a catalytic quantity of anthracene and/or magnesium anthracene has been added as activator, in the presence of complexing ligands.
Inventors
- 👤 Helmut Bonnemann
- 👤 Borislav Bogdanovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:54
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07F; C07F11/00; C07F15/00; C07F15/0006; C07F15/006; C07F15/0066; C07F15/0086; C07F15/04; C07F15/045; C07F17/00; C07F7/00; C07F7/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
5 words
η 5 -indenylcobalt-η 5 -cyclopentadienyl.
Claim 2
Dependent Claim
5 words
η 5 -indenylcobalt-η 5 -cyclopentadienyl.
Claim 3
Dependent Claim
5 words
η 5 -methylcyclopentadienyl cobalt cycloocta-(1,5)-diene.
Claim 4
Dependent Claim
5 words
η 5 -methylcyclopentadienyl cobalt cycloocta-(1,5)-diene.
Claim 5
Dependent Claim
5 words
η 5 -tert.-butylcyclopentadienyl cobalt cycloocta-(1,5)-diene.
Claim 6
Dependent Claim
5 words
η 5 -tert.-butylcyclopentadienyl cobalt cycloocta-(1,5)-diene.
Claim 7
Dependent Claim
6 words
η 5 -trimethylsilyl indenyl cobalt cycloocta-(1,5)-diene.
Claim 8
Dependent Claim
6 words
η 5 -trimethylsilyl indenyl cobalt cycloocta-(1,5)-diene.
Claim 9
Dependent Claim
6 words
η 5 -phenyl cyclopentadienyl cobalt cycloocta-(1,5)-diene.
Claim 10
Dependent Claim
6 words
η 5 -phenyl cyclopentadienyl cobalt cycloocta-(1,5)-diene.
Claim 11
Dependent Claim
5 words
η 5 -indenyl cobalt norbornadiene.
Claim 12
Dependent Claim
5 words
η 5 -indenyl cobalt norbornadiene.
References Cited (Backward Citations)
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Cited
US3959220A
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US4012399A
Cited
US4006149A
Cited
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Cited
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Cited
US4267329A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |