US4005092A
Expired / Lapsed
US
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Pyrylium dyes having a fused, rigidized nitrogen-containing ring
Assignee: Eastman Kodak Co
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Filing: 1975-10-29
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Granted: 1977-01-25
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Expires: 1995-10-29
Abstract
Abstract A class of pyrylium dyes, having at least one rigidized, nitrogen-containing heterocyclic ring fused thereto is described. The rigidized dyes are useful lasing components in lasing media.
Inventors
- 👤 George A. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:25
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213; C; C09; C09B; C09B57/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A compound having the formula: ##STR14##wherein R 3 represents hydrogen, alkyl having 1 to 10 carbon atoms, phenyl, carboxyphenyl, ethoxycarbonyl phenyl or when taken together with R 4 represents the carbon atoms necessary to complete a 5- to 7-membered fused ring; R 4 represents hydrogen or with R 3 represents the carbon atoms necessary to complete a 5- to 7-membered fused ring or when taken together with R 5 represents a 4-hydroxy substituted benzo ring; R 5 represents hydrogen, hydroxy or when taken together with R 4 represents 4-hydroxy substituted benzo ring; and X - is an anion.
Claim 2
Dependent Claim
98 words
A compound having the formula: ##STR14##wherein R 3 represents hydrogen, alkyl having 1 to 10 carbon atoms, phenyl, carboxyphenyl, ethoxycarbonyl phenyl or when taken together with R 4 represents the carbon atoms necessary to complete a 5- to 7-membered fused ring; R 4 represents hydrogen or with R 3 represents the carbon atoms necessary to complete a 5- to 7-membered fused ring or when taken together with R 5 represents a 4-hydroxy substituted benzo ring; R 5 represents hydrogen, hydroxy or when taken together with R 4 represents 4-hydroxy substituted benzo ring; and X - is an anion.
Claim 3
Dependent Claim
39 words
A compound according to claim 1 wherein R 3 represents hydrogen, alkyl having 1 to 10 carbon atoms or phenyl, carboxyphenyl, ethoxycarbonyl phenyl; R 4 represents hydrogen; R 5 represents hydrogen or hydroxy; and X - is an anion.
Claim 4
Dependent Claim
39 words
A compund according to claim 1 wherein R 3 taken together with R 4 represents the carbon atoms necessary to complete a 5- to 7-membered fused ring; R 5 is hydrogen or hydroxy; and X - is an anion.
Claim 5
Dependent Claim
47 words
A compound according to claim 1 wherein R 3 is hydrogen, alkyl having 1 to 10 carbon atoms or phenyl, carboxyphenyl, ethoxycarbonyl phenyl; R 4 taken together with R 5 represents the atoms necessary to form a 4-hydroxy substituted benzo ring; and X - is an anion.
Claim 6
Dependent Claim
20 words
A compound according to claim 1 wherein said anion is selected from the group consisting of halide, perchlorate and fluroborate.
References Cited (Backward Citations)
US3822270A
Cited
US3873940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |