US3217022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ferrocene compounds
Assignee: BASF SE
•
Filing: 1962-12-10
•
Granted: 1965-11-09
•
Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Cordes Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:03
CPC Classifications
C; C07; C07F; C07F17/00; C07F17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR PRODUCING FERROCENE COMPOUNDS WHICH COMPRISES REDUCING FERRIC CHLORIDE DISSOLVED IN A SOLVENT IN WHICH BOTH FERRIC CHLORIDE AND FERROUS CHLORIDE ARE SOLUBLE TO FERROUS CHLORIDE WITH IRON, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC, MONOHYDRIC ALCOHOLS HAVING 1-4 CARBONS, ETHYLENE GLYCOL, GLYCEROL, FORMAMIDE, LOWER ALKYL-SUBSTITUTED FORMAMIDE, N-LOWER ALKYL-SUBSTITUTED PYRROLIDONE, ACETONITRILE, AND ESTERS OF LOWER, SATURATED, ALIPHATIC MONOCARBOXYLIC ACIDS AND LOWER, SATURATED, MONOHYDRIC ALCOHOLS, ADDING TO THE RESULTING SOLUTION A STRONG ORGANIC BASE, THEREAFTER INTRODUCING INTO THE REACTION MIXTURE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE AND ALKYLSUBSTITUTED CYCLOPENTADIENES WITH ONE TO FOUR CARBON ATOMS IN THE ALKYL GROUP, AND THEREAFTER SEPARATING THE RESULTANT FERROCENE COMPOUND FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
118 words
A PROCESS FOR PRODUCING FERROCENE COMPOUNDS WHICH COMPRISES REDUCING FERRIC CHLORIDE DISSOLVED IN A SOLVENT IN WHICH BOTH FERRIC CHLORIDE AND FERROUS CHLORIDE ARE SOLUBLE TO FERROUS CHLORIDE WITH IRON, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC, MONOHYDRIC ALCOHOLS HAVING 1-4 CARBONS, ETHYLENE GLYCOL, GLYCEROL, FORMAMIDE, LOWER ALKYL-SUBSTITUTED FORMAMIDE, N-LOWER ALKYL-SUBSTITUTED PYRROLIDONE, ACETONITRILE, AND ESTERS OF LOWER, SATURATED, ALIPHATIC MONOCARBOXYLIC ACIDS AND LOWER, SATURATED, MONOHYDRIC ALCOHOLS, ADDING TO THE RESULTING SOLUTION A STRONG ORGANIC BASE, THEREAFTER INTRODUCING INTO THE REACTION MIXTURE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE AND ALKYLSUBSTITUTED CYCLOPENTADIENES WITH ONE TO FOUR CARBON ATOMS IN THE ALKYL GROUP, AND THEREAFTER SEPARATING THE RESULTANT FERROCENE COMPOUND FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US3071605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |