US4173002A
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Method of lasing with 7-hydroxy-coumarin-8-methyleneiminobisacetic acid and metal complexes thereof
Assignee: United States Department of the Navy
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Filing: 1978-03-20
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Granted: 1979-10-30
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Expires: 1998-03-20
Abstract
Abstract A method for lasing comprising preparing an aqueous solution of a member selected from the group consisting of 7-hydroxy-coumarin-8-methyleneiminobisacetic acid and the Ca ++ , Sr ++ , Ba ++ and Al +++ complexes thereof and subjecting the solution to the energy provided by a laser.
Inventors
- 👤 Dwight A. Fine
- 👤 Aaron N. Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:25
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
A method for lasing comprising the steps of: preparing a solution of a member selected from the group consisting of 7-hydroxy-coumarin-8-methyleneiminobisacetic acid and the Ca ++ Sr ++ , Ba ++ and Al +++ complexes of 7-hydroxy-coumarin-8-methyleneiminobisacetic acid; and subjecting said solution to energy provided by a laser whereby said member is caused to lase.
Claim 2
Independent Claim
55 words
A method for lasing comprising the steps of: preparing a solution of a member selected from the group consisting of 7-hydroxy-coumarin-8-methyleneiminobisacetic acid and the Ca ++ Sr ++ , Ba ++ and Al +++ complexes of 7-hydroxy-coumarin-8-methyleneiminobisacetic acid; and subjecting said solution to energy provided by a laser whereby said member is caused to lase.
Claim 3
Dependent Claim
15 words
A method according to claim 1 wherein said laser is a 25 kW nitrogen laser.
Claim 4
Dependent Claim
22 words
A method according to claim 2 wherein said solution is a solution of 7-hydroxy-coumarin-8-methyleneiminobisacetic acid having a molarity of ≧5×10 -3 .
Claim 5
Dependent Claim
64 words
A method according to claim 2 wherein said solution is a solution of a member selected from the group consisting of the Ca ++ , Sr ++ , Ba ++ and Al +++ complexes of 7-hydroxy-courmarin-8-methyleneiminobisacetic acid and is prepared by forming a solution of 7-hydroxy-coumarin-8-methyleneiminobiacetic acid having a molarity of ≧5×10 -3 and adding an equimolar to five-fold excess of complexing metal ion.
Claim 6
Dependent Claim
20 words
A method according to claim 3 wherein said solution has a pH in the range of from 7 to 10.
Claim 7
Dependent Claim
14 words
A method according to claim 3 wherein said solution has a pH of 3.
Claim 8
Dependent Claim
20 words
A method according to claim 4 wherein said solution has a pH in the range of from 7 to 10.
Claim 9
Dependent Claim
14 words
A method according to claim 4 wherein said solution has a pH of ≧10.
Claim 10
Dependent Claim
21 words
A method according to claim 4 wherein the complexing ion is Al +++ and the solution has a pH of 3.
References Cited (Backward Citations)
US4051062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |