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US4013471A
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Development of photographic silver halide elements
Assignee: Agfa Gevaert NV
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Filing: 1973-11-20
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Granted: 1977-03-22
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Expires: 1993-11-20
Abstract
Abstract Polyoxyethylene compounds carrying thioether groups as substituents on the linear chain are described for accelerating or activating development of exposed silver halide elements.
Inventors
- 👤 Robert Joseph Pollet
- 👤 Camille Angelina Vandeputte
- 👤 Francis Jeanne Sels
- 👤 Gerard Laurens Vanreusel
- 👤 Jozef Frans Willems
- 👤 George Frans VAN Veelen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
71 words
A method of developing a photographic element containing developable silver halide, said method including having a polyoxyethylene compound present in the element or in the developer bath during development, said polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula: ##EQU11## and 80 to 0 mole percent recurring units of the formula: ##EQU12## wherein R represents an aliphatic, aromatic, or heterocyclic group, and X is halogen.
Claim 2
Independent Claim
71 words
A method of developing a photographic element containing developable silver halide, said method including having a polyoxyethylene compound present in the element or in the developer bath during development, said polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula: ##EQU11## and 80 to 0 mole percent recurring units of the formula: ##EQU12## wherein R represents an aliphatic, aromatic, or heterocyclic group, and X is halogen.
Claim 3
Dependent Claim
11 words
Method according to claim 1 wherein R is alkyl or hydroxyalkyl.
Claim 4
Dependent Claim
20 words
Method according to claim 1 wherein the said compound is present in the aqueous alkaline solution used to effect development.
Claim 5
Dependent Claim
30 words
Method according to claim 1, wherein the said compound is present in the aqueous alkaline developing solution in an amount from about 10 mg and about 1 g per liter.
Claim 6
Dependent Claim
14 words
Method according to claim 1, wherein the photographic element is a photographic colour element.
Claim 7
Dependent Claim
30 words
Method according to claim 5, wherein the photographic colour element incorporates colour forming couplers capable of coupling with the oxidation products of a colour developing agent to form dyestuff images.
Claim 8
Dependent Claim
40 words
Method according to claim 6, wherein the photographic colour element is a multicolour element comprising a blue-sensitive emulsion layer with yellow-forming colour coupler, a green-sensitized emulsion layer wth magenta-forming colour coupler and a red-sensitized emulsion layer with cyan-forming colour coupler.
Claim 9
Dependent Claim
52 words
A photographic developer comprising a silver halide developing agent and a polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula: ##EQU13## and 80 to 0 mole percent recurring units of the formula: ##EQU14## wherein R represents an aliphatic, aromatic or heterocyclic group, and X is halogen.
Claim 10
Dependent Claim
52 words
A photographic developer comprising a silver halide developing agent and a polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula: ##EQU13## and 80 to 0 mole percent recurring units of the formula: ##EQU14## wherein R represents an aliphatic, aromatic or heterocyclic group, and X is halogen.
Claim 11
Dependent Claim
13 words
A photographic developer according to claim 8, wherein R is alkyl or hydroxyalkyl.
Claim 12
Dependent Claim
16 words
A photographic developer according to claim 8, wherein the developing agent is a black-and-white developing agent.
Claim 13
Dependent Claim
19 words
A photographic developer according to claim 8, wherein the developing agent is an aromatic primary amino colour developing agent.
Claim 14
Dependent Claim
18 words
A photographic developer according to claim 8, wherein the developing agent is a p-phenylene diamine colour developing agent.
Claim 15
Dependent Claim
27 words
A photographic developer according to claim 8, wherein the said compound is present in an amount comprised between about 10 mg and about 1 g per liter.
Claim 16
Dependent Claim
58 words
A photographic element comprising at least one silver halide emulsion layer wherein the emulsion layer contains a polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula: ##EQU15## and 80 to 0 mole percent recurring units of the formula: ##EQU16## wherein R represents an aliphatic, aromatic or heterocyclic group, and X is halogen.
Claim 17
Dependent Claim
58 words
A photographic element comprising at least one silver halide emulsion layer wherein the emulsion layer contains a polyoxyethylene compound comprising from about 20 to 100 mole percent recurring units of the formula: ##EQU15## and 80 to 0 mole percent recurring units of the formula: ##EQU16## wherein R represents an aliphatic, aromatic or heterocyclic group, and X is halogen.
Claim 18
Dependent Claim
13 words
A photographic element according to claim 14, wherein R is alkyl or hydroxyalkyl.
Claim 19
Dependent Claim
14 words
A photographic element according to claim 14, wherein the emulsion comprises a colour coupler.
Claim 20
Dependent Claim
22 words
Method according to claim 1, wherein R is selected from the group consisting of alkyl, aralkyl, hydroxyalkyl, alkoxyalkyl, alkylthioalkyl, acyloxyalkyl, cycloalkyl, aryl.
Claim 21
Dependent Claim
14 words
Method according to claim 2, wherein alkyl has from 1 to 5 carbon atoms.
Claim 22
Dependent Claim
24 words
A photographic developer according to claim 8, wherein R is selected from the group consisting of alkyl, aralkyl, hydroxyalkyl, alkoxyalkyl, alkylthioalkyl, acyloxyalkyl, cycloalkyl, aryl.
Claim 23
Dependent Claim
16 words
A photographic developer according to claim 9, wherein alkyl has from 1 to 5 carbon atoms.
Claim 24
Dependent Claim
24 words
A photographic element according to claim 14, wherein R is selected from the group consisting of alkyl, aralkyl, hydroxyalkyl, alkoxyalkyl, alkylthioalkyl, acyloxyalkyl, cycloalkyl, aryl.
Claim 25
Dependent Claim
16 words
A photographic element according to claim 15, wherein alkyl has from 1 to 5 carbon atoms.
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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |