US2834796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of iron cyclopentadienides
Assignee: California Research LLC
•
Filing: 1953-03-02
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Granted: 1958-05-13
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Maurice R Barusch
- 👤 Eddie G Lindstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
C; C07; C07F; C07F17/00; C07F17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A PROCESS FOR THE PREPARATION OF AN IRON CYCLOPENTADIENIDE WHICH COMPRISES REACTING AN ALKALI METAL CYCLOPENTADIENIDE WITH AN ANHYDROUS IRON SALT IN THE PRESENCE OF A NON-AQUEOUS LIQUID REACTION MEDIUM.
Claim 2
Dependent Claim
30 words
A PROCESS FOR THE PREPARATION OF AN IRON CYCLOPENTADIENIDE WHICH COMPRISES REACTING AN ALKALI METAL CYCLOPENTADIENIDE WITH AN ANHYDROUS IRON SALT IN THE PRESENCE OF A NON-AQUEOUS LIQUID REACTION MEDIUM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |