US3932415A
Expired / Lapsed
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Pyrylium dyes having a fused rigidized nitrogen-containing ring
Assignee: Eastman Kodak Co
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Filing: 1973-08-20
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Granted: 1976-01-13
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Expires: 1993-08-20
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 20:39
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/22; C09; C09B; C09B57/00; H; H01; H01S; H01S3/00; H01S3/14; H01S3/20; H01S3/213
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
A compound having the formula ##SPC14## wherein R 3 represents a member selected from the group consisting of hydrogen, alkyl having 1 to 10 carbon atoms, phenyl, carboxyphenyl and ethoxycarbonyl phenyl and X is an anion selected from the group consisting of halide, perchlorate and fluoroborate.
Claim 2
Dependent Claim
46 words
A compound having the formula ##SPC14## wherein R 3 represents a member selected from the group consisting of hydrogen, alkyl having 1 to 10 carbon atoms, phenyl, carboxyphenyl and ethoxycarbonyl phenyl and X is an anion selected from the group consisting of halide, perchlorate and fluoroborate.
Claim 3
Dependent Claim
10 words
The compound as in claim 1 which is 9-(2-carboxyphenyl)-2,3,6,7,12,13,16,17-octohydro-1H,5H,11H,15H-diquinolizino[1,9-bc;1',9'-hi]xanthylium salt.
Claim 4
Dependent Claim
10 words
The compound as in claim 1 which is 2,3,6,7,12,13,16,17-octohydro-1H,5H,11H,15H-diquinolizing[1,9-bc;1',9'-hi]xanthylium salt.
Claim 5
Dependent Claim
11 words
The compound as in claim 1 which is 8-(2-ethoxycarbonyl pheny)-2,3,6,7,12,13,16,17-octohydro-1H,5H,11H,15H-diquinolizino[1,9-bc;1',9'-hi]xanthylium salt.
References Cited (Backward Citations)
DE2238050A1
Cited
US3822270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |