US4051062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
7-Amino coumarin dyes for flashlamp-pumped dye lasers
Assignee: United States Department of the Navy
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Filing: 1976-09-03
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Granted: 1977-09-27
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Expires: 1996-09-03
Abstract
Abstract 7-Amino coumarin dyes with hydrocarbon substituents on the amino group, but otherwise unsubstituted are stable, efficient dyes which lase in the blue-green region in a flashlamp-pumped dye laser.
Inventors
- 👤 Peter R. Hammond
- 👤 Erhard J. Schimitschek
- 👤 John A. Trias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:26
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/02; H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
44 words
A laser dye solution comprising a compound of the type ##STR8## wherein R and R' are the same or different, being selected from the group consisting of hydrogen, methyl, ethyl, and a 3 carbon chain fused to ring 1 to form a heterocyclic ring.
Claim 2
Dependent Claim
44 words
A laser dye solution comprising a compound of the type ##STR8## wherein R and R' are the same or different, being selected from the group consisting of hydrogen, methyl, ethyl, and a 3 carbon chain fused to ring 1 to form a heterocyclic ring.
Claim 3
Dependent Claim
12 words
The compound of claim 1 wherein R and R' are methyl groups.
Claim 4
Dependent Claim
12 words
The compound of claim 1 wherein R and R' are ethyl groups.
Claim 5
Dependent Claim
11 words
The solution of claim 1 comprising an air-saturated absolute ethanol solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |