Patent US3450641A successfully refreshed from Google Patents.
US3450641A
Expired / Lapsed
US
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Substitute europium chelates for liquid laser operation
Assignee: United States Department of the Navy
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Filing: 1966-10-31
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Granted: 1969-06-17
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Erhard J Schimitschek
- 👤 Richard B Nehrich Jr
- 👤 John A Trias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:13
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A LIQUID LASING SOLUTION COMPRISING A CHELATE FORMED FO A MONO-SUBSTITUTED BENZOYLTRIFLUOROACETONATE LIGAND, A EUROPIUM SALT AND A BASE; SAID CHELATE BEING DISSOLVED IN ACETONITRILE, AND SAID SUBSTITUENTS BEING SELECTED FROM THE GROUP OF HALOGENS CONSISTING OF CHLORINE, BROMINE AND FLORINE THE SUBSTITUTIONS BEING MADE IN THE BENZENE RING OF THE LIGAND AND BEING SELECTIVELY MADE IN THE ORTHO, META OR PARA POSITIONS OF THE RING.
Claim 2
Dependent Claim
66 words
A LIQUID LASING SOLUTION COMPRISING A CHELATE FORMED FO A MONO-SUBSTITUTED BENZOYLTRIFLUOROACETONATE LIGAND, A EUROPIUM SALT AND A BASE; SAID CHELATE BEING DISSOLVED IN ACETONITRILE, AND SAID SUBSTITUENTS BEING SELECTED FROM THE GROUP OF HALOGENS CONSISTING OF CHLORINE, BROMINE AND FLORINE THE SUBSTITUTIONS BEING MADE IN THE BENZENE RING OF THE LIGAND AND BEING SELECTIVELY MADE IN THE ORTHO, META OR PARA POSITIONS OF THE RING.
References Cited (Backward Citations)
US3360478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |