US2862945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel cyclopentadienides and process for preparing same
Assignee: California Research LLC
•
Filing: 1953-01-28
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Granted: 1958-12-02
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Expires: 1973-01-28
Abstract
No abstract record available.
Inventors
- 👤 Eddie G Lindstrom
- 👤 Maurice R Barusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:40
CPC Classifications
C; C07; C07F; C07F17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PROCESS FOR THE PREPARATION OF A NICKEL CYCLOPENTADIENIDE WHICH COMPRISES REACTING A METAL CYCLOPENTADIENIDE OF THE CLASS CONSISTING OF ALKALI AND ALKALINE EARTH METALS WITH AN ANHYDROUS NICKEL SALT IN THE PRESENCE OF LIQUID AMMONIA.
Claim 2
Dependent Claim
36 words
A PROCESS FOR THE PREPARATION OF A NICKEL CYCLOPENTADIENIDE WHICH COMPRISES REACTING A METAL CYCLOPENTADIENIDE OF THE CLASS CONSISTING OF ALKALI AND ALKALINE EARTH METALS WITH AN ANHYDROUS NICKEL SALT IN THE PRESENCE OF LIQUID AMMONIA.
References Cited (Backward Citations)
US2680756A
Cited
US2680758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |