US2769828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of iron biscyclopentadienyl
Assignee: California Research LLC
•
Filing: 1953-01-02
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Granted: 1956-11-06
•
Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Robert P Sieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:58
CPC Classifications
C; C07; C07F; C07F17/00; C07F17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A CYCLIC PROCESS FOR THE PRODUCTION OF IRON BISCYCLOPENTADIENYL WHICH COMPRISES REACTING A CYCLOPENTADIENE WITH AN IRON REACTANT POSSESSING A SURFACE OF ELEMENTAL IRON AT A TEMPERATURE IN THE RANGE OF 400 TO 800* F., CONTACTING THE REACTION SPENT IRON REACTANT WITH AN OXIDIZING GAS SELECTED FROM THE GROUP CONSISTING OF STEAM AND CARBON DIOXIDE AT A TEMPERATURE IN THE RANGE OF 600 TO 1600* F. TO PRODUCE A SURFACE OF EQUILIBRIUM IRON OXIDE ON SAID IRON REACTANT, REDUCING THE RESULTING OXIDIZED IRON REACTANT WITH A REDUCING AGENT TO PRODUCE A REACTIVE SURFACE OF ELEMENTAL IRON AND THEREAFTER CONTACTING THE RESULTING REACTIVE ELEMENTAL IRON REACTANT WITH THE CYCLOPENTADIENE CHARGE.
Claim 2
Dependent Claim
109 words
A CYCLIC PROCESS FOR THE PRODUCTION OF IRON BISCYCLOPENTADIENYL WHICH COMPRISES REACTING A CYCLOPENTADIENE WITH AN IRON REACTANT POSSESSING A SURFACE OF ELEMENTAL IRON AT A TEMPERATURE IN THE RANGE OF 400 TO 800* F., CONTACTING THE REACTION SPENT IRON REACTANT WITH AN OXIDIZING GAS SELECTED FROM THE GROUP CONSISTING OF STEAM AND CARBON DIOXIDE AT A TEMPERATURE IN THE RANGE OF 600 TO 1600* F. TO PRODUCE A SURFACE OF EQUILIBRIUM IRON OXIDE ON SAID IRON REACTANT, REDUCING THE RESULTING OXIDIZED IRON REACTANT WITH A REDUCING AGENT TO PRODUCE A REACTIVE SURFACE OF ELEMENTAL IRON AND THEREAFTER CONTACTING THE RESULTING REACTIVE ELEMENTAL IRON REACTANT WITH THE CYCLOPENTADIENE CHARGE.
References Cited (Backward Citations)
US2391723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |