Patent US2983740A successfully refreshed from Google Patents.
US2983740A
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Compounds of a group iv-a metal directly bonded to two cyclopentadienyl nuclei and to at least one inorganic anion and their preparation
Assignee: EIDP Inc
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Filing: 1953-06-15
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Granted: 1961-05-09
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Expires: 1973-06-15
Abstract
No abstract record available.
Inventors
- 👤 John C Thomas
- 👤 Gerald M Whitman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:19
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; C; C07; C07F; C07F7/00; C07F7/28; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/305; B01J2231/00; B01J2231/10; B01J2531/00; B01J2531/40; B01J2531/46; B01J2531/48; B01J2531/49; B01J31/02; B01J31/12; B01J31/122; B01J31/2204; B01J31/2208; B01J31/26; B01J31/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
89 words
THE PROCESS WHICH COMPRISES REACTING, UNDER ANHYDROUS CONDITIONS, A ZIRCONIUM TERRAHALIDE WITH A CYCLOPENTADIENYLMAGNESIUM HALIDE IN WHICH MAGNESIUM IS DIRECTLY BONDED TO HALOGEN HAVING AN ATOMIC NUMBER OF AT LEAST 17 AND IS FURTHER DIRECTLY BONDED TO A CYCLOPENTADIENYL RADICAL OF THE GROUP CONSISTING OF CYCLOPENTADIENYL, METHLCYCLOPENTADIENYL, DIMETHYLCLOPENTADIENYL, ETHYLCYCLOPENTADIENYL, CYCLOHEXYLCYCLOPENTADIENYL, PHENYLCYCLOPENTADIENYL AND DIPHENYLCYCLOPENTADIENYL RADICALS, AND ISOLATING FROM THE REACTION MIXTURE AN ORGANOIZRCONIUM COMPOUND IN WHICH ZIRCONIUM IS DIRECTLY BONDED TO TWO HALOGEN ATOMS OF THE SAME ATOMIC NUMBER AND IS FURTHER DIRECTLY BONDED TO TWO OF SAID CYCLOPENTADIENYL RADICALS.
Claim 4
Dependent Claim
89 words
THE PROCESS WHICH COMPRISES REACTING, UNDER ANHYDROUS CONDITIONS, A ZIRCONIUM TERRAHALIDE WITH A CYCLOPENTADIENYLMAGNESIUM HALIDE IN WHICH MAGNESIUM IS DIRECTLY BONDED TO HALOGEN HAVING AN ATOMIC NUMBER OF AT LEAST 17 AND IS FURTHER DIRECTLY BONDED TO A CYCLOPENTADIENYL RADICAL OF THE GROUP CONSISTING OF CYCLOPENTADIENYL, METHLCYCLOPENTADIENYL, DIMETHYLCLOPENTADIENYL, ETHYLCYCLOPENTADIENYL, CYCLOHEXYLCYCLOPENTADIENYL, PHENYLCYCLOPENTADIENYL AND DIPHENYLCYCLOPENTADIENYL RADICALS, AND ISOLATING FROM THE REACTION MIXTURE AN ORGANOIZRCONIUM COMPOUND IN WHICH ZIRCONIUM IS DIRECTLY BONDED TO TWO HALOGEN ATOMS OF THE SAME ATOMIC NUMBER AND IS FURTHER DIRECTLY BONDED TO TWO OF SAID CYCLOPENTADIENYL RADICALS.
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |