Patent US3731222A successfully refreshed from Google Patents.
US3731222A
Expired / Lapsed
US
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Phenoxazine dye lasers
Assignee: Eastman Kodak Co
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Filing: 1972-03-30
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Granted: 1973-05-01
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Expires: 1992-03-30
Abstract
Abstract Phenoxazine dyes are useful as laser dyes. These dyes are used in solution with a non-interfering solvent to form lasing media useful in dye lasers. Such lasers generally include a reservoir for containing the laser dye solution and a pumping energy source operably associated therewith for producing stimulated emission of the laser dye solution.
Inventors
- 👤 K Drexhage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:49
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
The invention as described in claim 1 wherein said dye is present in a concentration of about 10 2 to 10 6 molar.
Claim 2
Dependent Claim
45 words
A dye laser comprising a laser dye solution and a pumping energy source operably coupled therewith and capable of producing stimulated emission of the dye solution, said dye solution comprising a lasing concentration, in a non-interfering solvent of a dye having a formula as follows:
Claim 3
Independent Claim
51 words
A method of producing coherent laser emission in the wavelength range of about 500 to about 800 nm. comprising the step of pumping a dye solution containing between about 10 2 to about 10 6 molar concentration of lasing dye in a non-interfering solvent, said dye having a formula as follows:
Claim 4
Dependent Claim
25 words
The invention as described in claim 4 wherein said dye has the formula: wherein R7, R8, R9 and R10 are as defined in claim 4.
Claim 5
Dependent Claim
27 words
The invention as described in claim 4 wherein said dye has the formula: wherein R5, R6, R7, R8, R9 and R10 are as defined in claim 4.
Claim 6
Dependent Claim
13 words
The invention as described in claim 4 whereIn said dye has the formula:
Claim 7
Dependent Claim
14 words
The invention as described in claim 4 wherein said dye is 7-hydroxy-3H-phenoxazine-3-one or 7-hydroxy-3H-phenoxazine-3-one-10-oxide.
Claim 8
Dependent Claim
15 words
The invention as described in claim 4 wherein said dye is a salt of 9-diethylamino-5-imino-5H-benzo(a)-phenoxazine.
Claim 9
Dependent Claim
15 words
The invention as described in claim 4 wherein said dye is a salt of 7-diethylamino-3-(ethylimino)-3H-phenoxazine.
Claim 10
Dependent Claim
15 words
The invention as described in claim 4 wherein said dye is a salt of 9-amino-5-imino-5H-benzo(a)phenoxazine.
Claim 11
Dependent Claim
15 words
The invention as described in claim 4 wherein said dye is a salt of 2,8-dimethyl-7-ethylamino-3-(ethylimino)-3H-phenoxazine.
References Cited (Backward Citations)
US3684979A
Cited
US3679995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |