Patent US3671648A successfully refreshed from Google Patents.
US3671648A
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Carbocyanine filter dyes and sensitizers for silver halide emulsions
Assignee: Eastman Kodak Co
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Filing: 1969-05-15
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Granted: 1972-06-20
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Expires: 1989-05-15
Abstract
Abstract New tricarbocyanine dyes derived from enamine and enaminium salts are useful as filter dyes and spectral sensitizers for photographic silver halide emulsions. They sensitize such emulsions over a wavelength range of about from 660 to 850 Mu , and higher in some instances, with maximum sensitivity ranging about from 750 to 800 Mu .
Inventors
- 👤 Arthur Fumia Jr
- 👤 Donald W Heseltine
- 👤 Leslie G S Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; C; C09; C09B; C09B23/00; C09B23/0066; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
38 words
A dye compound in accordance with claim 1 wherein R represents a member selected from the group consisting of an alkyl group having one to eight carbon atoms, a carboxy(low carbon alkyl)group, and a low carbon sulfoalkyl group.
Claim 2
Dependent Claim
20 words
A dye compound in accordance with claim 1 wherein Z represents the nonmetallic atoms required to complete a benzothiazole nucleus.
Claim 3
Dependent Claim
20 words
A dye compound in accordance with claim 1 wherein Z represents the nonmetallic atoms required to complete a naphthothiazole nucleus.
Claim 4
Dependent Claim
20 words
A dye compound in accordance with claim 1 wherein Z represents the nonmetallic atoms required to complete a benzoxazole nucleus.
Claim 5
Dependent Claim
20 words
A dye compound in accordance with claim 1 wherein Z represents the nonmetallic atoms required to complete a benzoselenazole nucleus.
Claim 6
Dependent Claim
16 words
A dye compound in accordance with claim 1 wherein the dye compound is 11-di(ethoxycarbonylmethyl)amino-3,3''-diethyl-10,12-ethylene -thiatricarbocyanine iodide.
Claim 7
Dependent Claim
16 words
A dye compound in accordance with claim 1 wherein the dye compound is anhydro-11-diphenylamino-10,12-ethylene-3,3''-di(3-sulfopropyl)-4,5;4'',5'' -dibenzothiatricarbocyanine hydroxide.
Claim 8
Dependent Claim
16 words
A dye compound in accordance with claim 1 wherein the dye compound is anhydro-3,3''-di(2-carboxyethyl)-5,5''-dichloro-11-diphenylamino-10,12 -ethylene-thiatricarbocyanine hydroxide.
Claim 9
Dependent Claim
15 words
A dye compound in accordance with claim 1 wherein the dye compound is 3,3''-diethyl-10,12-ethylene-11-(N-methylani-lino)oxatricarbocyanine perchlorate.
Claim 10
Dependent Claim
18 words
A dye compound in accordance with claim 1 wherein the dye compound is anhydro-10,12-ethylene-11-methylanilino-3,3''-di(3 -sulfopropyl)thiatricarbocyanine hydroxide, sodium salt.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |