US5380635A
Expired / Lapsed
US
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Dihydroperimidine squarylium dyes as antihalation and acutance materials for photographic and photothermographic articles
Assignee: Eastman Kodak Co
•
Filing: 1994-02-28
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Granted: 1995-01-10
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Expires: 2014-02-28
Abstract
Abstract Dihydroperimidine squarylium dyes have been found to be particularly effective when used in acutance and antihalation systems for photothermographic and photographic articles.
Inventors
- 👤 Charles W. Gomez
- 👤 Lori S. Harring
- 👤 Randall H. Helland
- 👤 William D. Ramsden
- 👤 Tran Van Thien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; C; C09; C09B; C09B57/00; C09B57/007; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C1/49854
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
21 words
A photothermographic article comprising: a support bearing an electromagnetic-radiation-sensitive silver halide material; and a dihydroperimidine squarylium dye having the nucleus: ##STR13##
Claim 2
Dependent Claim
21 words
A photothermographic article comprising: a support bearing an electromagnetic-radiation-sensitive silver halide material; and a dihydroperimidine squarylium dye having the nucleus: ##STR13##
Claim 3
Dependent Claim
86 words
The photothermographic article of claim 1 wherein the dihydroperimidine squarylium dye has the nucleus: ##STR14## wherein, R 1 , R 2 , R 3 , and R 4 each independently represent hydrogen, an alkyl group having from 1-20 carbon atoms, a cycloalkyl group having from 1-20 carbon atoms, an aryl group having up to 14 carbon atoms, or R 1 and R 2 , and/or R 3 and R 4 , or R 2 and R 3 taken together represent a 5-, 6-, or 7-membered ring.
Claim 4
Dependent Claim
87 words
The photothermographic article of claim 1 wherein the dihydroperimidine squarylium dye has the general formula: ##STR15## wherein, R 1 , R 2 , R 3 , and R 4 each independently represent hydrogen, an alkyl group having from 1-20 carbon atoms, a cycloalkyl group having from 1-20 carbon atoms, an aryl group having up to 14 carbon atoms, or R 1 and R 2 , and/or R 3 and R 4 , or R 2 and R 3 taken together represent a 5-, 6-, or 7-membered ring.
Claim 5
Dependent Claim
65 words
The photothermographic article of claim 1 wherein the dihydroperimidine squarylium dye has the formula: ##STR16## wherein: R 1 and R 4 are hydrogen and R 2 and R 3 independently represent an alkyl group having from 1-20 carbon atoms, a cycloalkyl group having from 1-20 carbon atoms, an aryl group, or R 2 and R 3 taken together form a 5-, 6-, or 7-membered ring.
Claim 6
Dependent Claim
23 words
The photothermographic element of claim 4 in which R 2 and R 3 are taken together form a 5-, 6-, or 7-membered ring.
Claim 7
Dependent Claim
16 words
The photothermographic element of claim 1 in which the dihydroperimidine squarylium dye has the formula: ##STR17##
Claim 8
Dependent Claim
17 words
The photothermographic article of claim 1 wherein the dihydroperimidine squarylium dye is incorporated in an antihalation layer.
Claim 9
Dependent Claim
21 words
The photothermographic article of claim 1 wherein the dihydroperimidine squarylium dye is incorporated in the photosensitive layer as an acutance dye.
Claim 10
Dependent Claim
14 words
The photothermographic article of claim 1 in which said silver halide material is infrared-sensitive.
Claim 11
Dependent Claim
14 words
The photothermographic article of claim 1 in which the support is a clear material.
Claim 12
Dependent Claim
10 words
The photothermographic article of claim 1 having a grayish-brown tint.
Claim 13
Dependent Claim
33 words
The photothermographic article of claim 1 in which said dye is present in an amount sufficient to provide an optical density of from 0.05 to 3.0 absorbance units at λmax of the dye.
Claim 14
Dependent Claim
21 words
A photographic article comprising: a support bearing an electromagnetic-radiation-sensitive silver halide material; and a dihydroperimidine squarylium dye having the nucleus: ##STR18##
Claim 15
Dependent Claim
21 words
A photographic article comprising: a support bearing an electromagnetic-radiation-sensitive silver halide material; and a dihydroperimidine squarylium dye having the nucleus: ##STR18##
Claim 16
Dependent Claim
87 words
The photographic article of claim 13 wherein the dihydroperimidine squarylium dye has the formula: ##STR19## wherein R 1 , R 2 , R 3 , and R 4 each independently represent hydrogen, an alkyl group having from 1-20 carbon atoms, a cycloalkyl group having from 1-20 carbon atoms, an aryl group having up to 14 carbon atoms, or R 1 and R 2 , and/or R 3 and R 4 , or R 2 and R 3 are taken together represent a 5-, 6-, or 7-membered ring.
Claim 17
Dependent Claim
65 words
The photographic article of claim 13 wherein the dihydroperimidine squarylium dye has the formula: ##STR20## wherein: R 1 and R 4 are hydrogen and R 2 and R 3 independently represent an alkyl group having from 1-20 carbon atoms, a cycloalkyl group having from 1-20 carbon atoms, an aryl group, or R 2 and R 3 taken together from a 5-, 6-, or 7-membered ring.
Claim 18
Dependent Claim
17 words
The photographic article of claim 13 wherein the dihydroperimidine squarylium dye is incorporated in an antihalation layer.
Claim 19
Dependent Claim
21 words
The photographic article of claim 13 wherein the dihydroperimidine squarylium dye is incorporated in the photosensitive layer as an acutance dye.
Claim 20
Dependent Claim
14 words
The photographic article of claim 13 in which said silver halide material is infrared-sensitive.
Claim 21
Dependent Claim
14 words
The photographic article of claim 13 in which the support is a clear material.
Claim 22
Dependent Claim
10 words
The photographic article of claim 13 having a grayish-brown tint.
Claim 23
Dependent Claim
33 words
The photographic article of claim 13 in which said dye is present in an amount sufficient to provide an optical density of from 0.05 to 3.0 absorbance units at λmax of the dye.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |