US2680758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dicyclopentadienylnickel and method
Assignee: EIDP Inc
•
Filing: 1952-07-10
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Granted: 1954-06-08
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Expires: 1972-07-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas John Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:28
CPC Classifications
C; C07; C07F; C07F17/00; B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; B01J31/02; B01J31/12; B01J31/122; B01J31/26; B01J31/28; B01J31/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
DICYCLOPENTADIENYLNICKEL.
Claim 2
Dependent Claim
1 words
DICYCLOPENTADIENYLNICKEL.
Claim 3
Dependent Claim
48 words
PROCESS OF PREPARING DICYCLOPENTADIENYLNICKEL WHICH COMPRISES REACTING A CYCLOPENTADIENYLMAGNESIUM HALIDE OF A HALOGEN HAVING AN ATOMIC NUMBER OF AT LEAST 17, WITH A NICKEL HALIDE OF A HALOGEN HAVING AN ATOMIC NUMBER OF AT LEAST 17, UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE OF 0* C. TO 150* C.
Claim 4
Dependent Claim
48 words
PROCESS OF PREPARING DICYCLOPENTADIENYLNICKEL WHICH COMPRISES REACTING A CYCLOPENTADIENYLMAGNESIUM HALIDE OF A HALOGEN HAVING AN ATOMIC NUMBER OF AT LEAST 17, WITH A NICKEL HALIDE OF A HALOGEN HAVING AN ATOMIC NUMBER OF AT LEAST 17, UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE OF 0* C. TO 150* C.
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) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |