US2848506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cyclopentadienylsodium
Assignee: Hercules Powder Co
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Filing: 1954-04-29
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Granted: 1958-08-19
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 David S Breslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:43
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS OF PREPARING A CYCLOPENTADIENYLMONOSODIUM COMPOUND WHICH COMPRISES REACTING ONE OF THE GROUP CONSISTING OF CYCLOPENTADIENE AND ALKYLCYCLOPENTADIENES WHEREIN THE CYCLOPENTADIENYL RADICAL CONTAINS FROM 1 TO 2 ALKYL SUBSTITUENTS WITH ONE OF THE GROUP CONSISTING OF SODIUM AND SODIUM COMPOUNDS MORE BASIC THAN SODIUM HYDROXIDE IN AN INERT LIQUID ORGANIC DILUENT IN WHICH THE CYCLOPENTADIENYLSODIUM COMPOUND IS SOLUBLE, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN, DIMETHYLFORMAMIDE, AND TERT-BUTYL ALCOHOL.
Claim 2
Dependent Claim
73 words
THE PROCESS OF PREPARING A CYCLOPENTADIENYLMONOSODIUM COMPOUND WHICH COMPRISES REACTING ONE OF THE GROUP CONSISTING OF CYCLOPENTADIENE AND ALKYLCYCLOPENTADIENES WHEREIN THE CYCLOPENTADIENYL RADICAL CONTAINS FROM 1 TO 2 ALKYL SUBSTITUENTS WITH ONE OF THE GROUP CONSISTING OF SODIUM AND SODIUM COMPOUNDS MORE BASIC THAN SODIUM HYDROXIDE IN AN INERT LIQUID ORGANIC DILUENT IN WHICH THE CYCLOPENTADIENYLSODIUM COMPOUND IS SOLUBLE, SAID DILUENT BEING SELECTED FROM THE GROUP CONSISTING OF TETRAHYDROFURAN, DIMETHYLFORMAMIDE, AND TERT-BUTYL ALCOHOL.
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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |