US2916503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friedel-crafts reaction with metal cyclopentadienyl compounds
Assignee: Ethyl Corp
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Filing: 1956-10-31
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Granted: 1959-12-08
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Expires: 1976-10-31
Abstract
No abstract record available.
Inventors
- 👤 Kozikowski John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
C; C07; C07F; C07F17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS WHICH COMPRISES REACTING A COMPOUND HAVING THE FORMULA AXMBYCZ WHERE A IS A HYDROCARBON CYCLOPENTASIEBYL RADICAL HAVING HYDROGEN BONDED TO A CYCLOPENTADIENYL CARBON, M IS A TRANSITION METAL SELECTED FROM THE CLASS CONSISTING OF THE METALS OF GROUPS IVB, VB, VIB, VIB, VIII, IB AND IIB OF THE PERIODIC TABLE, B AND C ARE ELECTRON DONATING GROUPS DIFFERENT FROM A CYCLOPENTADIENYL RADICALS AND SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, THE CYANO GROUP, THE ISONITRILE RADICA, CARBON MONOXIDE, AMMONIA, A PRIMARY AMINE, A SECONDARY AMINE, A TERTIARY AMINE AND NITROSYL GROUP, X IS A SMALL INTEGER FROM 1-2 INSLUSIVE, Y IS A SMALL INTEGER FROM 1-4 INCLUSIVE AND Z IS A SMALL WHOLE NUMBER FROM 0-2 INCLUSIVE SUCH THAT THE METAL ATOM IS IN A STATE MAXIMUM COVALENCY, WITH A FRIEDEL-CRAFTS ADDITION AGENT IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST.
Claim 2
Dependent Claim
142 words
A PROCESS WHICH COMPRISES REACTING A COMPOUND HAVING THE FORMULA AXMBYCZ WHERE A IS A HYDROCARBON CYCLOPENTASIEBYL RADICAL HAVING HYDROGEN BONDED TO A CYCLOPENTADIENYL CARBON, M IS A TRANSITION METAL SELECTED FROM THE CLASS CONSISTING OF THE METALS OF GROUPS IVB, VB, VIB, VIB, VIII, IB AND IIB OF THE PERIODIC TABLE, B AND C ARE ELECTRON DONATING GROUPS DIFFERENT FROM A CYCLOPENTADIENYL RADICALS AND SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, THE CYANO GROUP, THE ISONITRILE RADICA, CARBON MONOXIDE, AMMONIA, A PRIMARY AMINE, A SECONDARY AMINE, A TERTIARY AMINE AND NITROSYL GROUP, X IS A SMALL INTEGER FROM 1-2 INSLUSIVE, Y IS A SMALL INTEGER FROM 1-4 INCLUSIVE AND Z IS A SMALL WHOLE NUMBER FROM 0-2 INCLUSIVE SUCH THAT THE METAL ATOM IS IN A STATE MAXIMUM COVALENCY, WITH A FRIEDEL-CRAFTS ADDITION AGENT IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST.
References Cited (Backward Citations)
US2818416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |