Patent US3719495A successfully refreshed from Google Patents.
US3719495A
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Use of merocyanine compounds in photothermosensitive systems
Assignee: 3M Co
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Filing: 1970-09-29
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Granted: 1973-03-06
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Expires: 1990-09-29
Abstract
Abstract A light-sensitive system including an intimate mixture of a light-insensitive silver salt which yields a visible change upon reduction, and light-sensitive silver halide in an amount sufficient to catalyze reduction of the light-insensitive silver salt upon exposure of the system to light followed by heating in the presence of a reducing agent, the mixture being characterized by including a tri-nuclear merocyanine dye capable of sensitizing the mixture to the longer wavelength portion of the visible spectrum. Also described are novel merocyanine dyes and lightsensitive sheets containing the above-described mixture.
Inventors
- 👤 B Lea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C1/49854; C; C09; C09B; C09B23/00; C09B23/0075
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
80 words
A light-sensitive composition comprising an intimate mixture of a substantially light-insensitive silver salt of an organic acid which upon reduction gives a visible change and sufficient of a silver halide to catalyze this reduction to give a visible change in those areas where the silver halide has been exposed to light and the mixture is heated in the presence of a reducing agent for said light-insensitive silver salt, said mixture further including a merocyanine tri-nuclear dye having the general formula:
Claim 2
Dependent Claim
80 words
A light-sensitive composition comprising an intimate mixture of a substantially light-insensitive silver salt of an organic acid which upon reduction gives a visible change and sufficient of a silver halide to catalyze this reduction to give a visible change in those areas where the silver halide has been exposed to light and the mixture is heated in the presence of a reducing agent for said light-insensitive silver salt, said mixture further including a merocyanine tri-nuclear dye having the general formula:
Claim 3
Dependent Claim
43 words
The composition of claim 1 wherein Q represents -S-, -SE- or -CH CH-, Z represents -S-, and R4 and R5 each independently represents any of the groupings represented by R1 including the groups R7COOH and R7SO3H where R7 represents a lower alkylene group.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein said merocyanine dye is 3-ethyl-5((3-ethyl-2-benzothiazolinylidene)ethylidene)-2(3-ethyl-4-oxo-2 -thio-5-thiazolidinylidene)-4-thiazolidone.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein said merocyanine dye is 3-ethyl-5((1-ethyl-1,2-dihydroquinolinylidene-2)ethylidene)-2(3 -carboxymethyl-4-oxo-2-thio-5-thiazolidinylidene)-4-thiazolidone.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein said merocyanine dye is 3-n-heptyl-5((3-ethyl-2-benzothiazolinylidene)ethylidene)-2(3-carboxymethyl -4-oxo-2-thio-5-thiazolidinylidene)-4-thiazolidone.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein said merocyanine dye is 3-ethyl-5((5-chloro-3-ethyl-2-benzothiazolinylidene)ethylidene)-2(3 -carboxymethyl-4-oxo-2-thio-5-thiazolidinylidene)-4-thiazolidone.
Claim 8
Dependent Claim
24 words
The composition of claim 1 containing from 0.01 to 2.0 g of said merocyanine dye per gram mole of total silver in the composition.
Claim 9
Dependent Claim
24 words
The composition of claim 7 containing from 0.4 to 1.0 g of the merocyanine dye per gram mole of total silver in the composition.
Claim 10
Dependent Claim
28 words
The composition of claim 1 wherein said silver halide is present in an amount of from 0.1 to 10 percent by weight of the mixture of silver compounds.
Claim 11
Dependent Claim
15 words
The composition of claim 1 additionally comprising a reducing agent for said light-insensitive silver compound.
Claim 12
Dependent Claim
85 words
A sheet-like, light-sensitive recording element comprising a support bearing at least one light-sensitive layer comprising, in intimate mixture, a. a light-insensitive silver salt of an organic acid which upon reduction undergoes visible change, b. silver halide in an amount sufficient to catalyze the reduction of said light-insensitive silver compound after exposure of said element to a light image and upon heating of the element in the presence of a reducing agent for said light-insensitive silver compound, and c. a tri-nuclear merocyanine dye of the formula
Claim 13
Dependent Claim
85 words
A sheet-like, light-sensitive recording element comprising a support bearing at least one light-sensitive layer comprising, in intimate mixture, a. a light-insensitive silver salt of an organic acid which upon reduction undergoes visible change, b. silver halide in an amount sufficient to catalyze the reduction of said light-insensitive silver compound after exposure of said element to a light image and upon heating of the element in the presence of a reducing agent for said light-insensitive silver compound, and c. a tri-nuclear merocyanine dye of the formula
Claim 14
Dependent Claim
25 words
The recording element of claim 11 additionally including a layer containing a reducing agent for said light-insensitive silver salt in contact with said light-sensitive layer.
Claim 15
Dependent Claim
82 words
A sheet-like, light-sensitive recording element comprising a support bearing at least one light-sensitive layer comprising a mixture of a substantially light-insensitive silver salt of an organic acid which upon reduction gives a visible change and sufficient of a silver halide to catalyze said reduction in those areas where said silver halide has been exposed to light and the mixture heated in the presence of a reducing agent for said light-insensitive silver salt, said mixture further including a merocyanine dye of the formula:
Claim 16
Dependent Claim
82 words
A sheet-like, light-sensitive recording element comprising a support bearing at least one light-sensitive layer comprising a mixture of a substantially light-insensitive silver salt of an organic acid which upon reduction gives a visible change and sufficient of a silver halide to catalyze said reduction in those areas where said silver halide has been exposed to light and the mixture heated in the presence of a reducing agent for said light-insensitive silver salt, said mixture further including a merocyanine dye of the formula:
Claim 17
Dependent Claim
87 words
A sheet-like, light-sensitive recording element comprising a support bearing at least one light-sensitive layer comprising, in intimate mixture, a. a substantially light-insensitive silver salt of an organic acid which upon reduction gives a visible change, b. silver halide in an amount sufficient to catalyze the reduction of said light-insensitive silver salt after exposure of said element to a light image and upon heating of the element in the presence of a reducing agent for said light-insensitive silver salt, and c. a tri-nuclear merocyanine dye of the formula
Claim 18
Dependent Claim
87 words
A sheet-like, light-sensitive recording element comprising a support bearing at least one light-sensitive layer comprising, in intimate mixture, a. a substantially light-insensitive silver salt of an organic acid which upon reduction gives a visible change, b. silver halide in an amount sufficient to catalyze the reduction of said light-insensitive silver salt after exposure of said element to a light image and upon heating of the element in the presence of a reducing agent for said light-insensitive silver salt, and c. a tri-nuclear merocyanine dye of the formula
Claim 19
Dependent Claim
23 words
The recording element according to claim 14 wherein, in said merocyanine dye, Q represents -S-, -Se-, or -CH CH-, and Z represents -S-,
Claim 20
Dependent Claim
14 words
The recording element according to claim 14 wherein said merocyanine dye is 3-Ethyl-5((1-ethyl-1,2-dihydroquinolinylidene-2)ethylidene)-1(3 -carboxymethyl-4-oxo-2-thio-5-thiazolidinylidene)-4-thiazolidone.
Claim 21
Dependent Claim
14 words
The recording element according to claim 14 wherein said merocyanine dye is 3-n-Heptyl-5((3-ethyl-2-benzothiazolinylidene)ethylidene)-2(3-carboxymethyl -4-oxo-2-thio-5-thiazolidinylidene)-4-thiazolidone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |