Patent US3867418A successfully refreshed from Google Patents.
US3867418A
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Europium complex of 1,1,1,2,2,6,6,7,7,7-decafluoro-3,5-heptanedione
Assignee: Iowa State University Research Foundation Inc
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Filing: 1973-11-19
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Granted: 1975-02-18
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Expires: 1993-11-19
Abstract
Abstract A paramagnetic shift reagent, consisting of the europium (Eu) complex of 1,1,1,2,2,6,6,7,7,7-decafluoro-3,5-heptanedione (H(FHD)), said complex having the general formula Eu(FHD)3.
Inventors
- 👤 Charles A Burgett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:31
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/92; C07C45/00; C07C45/27; C07C45/29; C07C45/292; C07C45/51; C07C45/511; C07C45/515; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C47/00; C07C47/02; C07C47/14; C07C49/04; C07C49/16; C07C49/167; C07C49/20; C07C49/24; Y; Y10; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PARAMAGNETIC SHIFT REAGENT CONSISTING OF THE EUROPIUM (EU) COMPLEX OF 1,1,1,2,2,6,6,7,7,7-DECAFLUORO-3,5HEPTANEDIONE (H(FHD),SAID COMPLEX HAVING THE GENERAL FORMULA EU(FHD)3.
Claim 2
Dependent Claim
19 words
A PARAMAGNETIC SHIFT REAGENT CONSISTING OF THE EUROPIUM (EU) COMPLEX OF 1,1,1,2,2,6,6,7,7,7-DECAFLUORO-3,5HEPTANEDIONE (H(FHD),SAID COMPLEX HAVING THE GENERAL FORMULA EU(FHD)3.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |