US3915715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic materials containing a high weight ratio of gold to sulfur sensitizers and a sensitizing methine dye
Assignee: Eastman Kodak Co
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Filing: 1973-05-16
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Granted: 1975-10-28
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Expires: 1993-05-16
Abstract
Abstract Light-sensitive silver halide grains having an average size of up to .2 micron are sensitized with a noble metal sensitizer at a concentration of at least 50 mg. noble metal per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to noble metal of about 1:15 to 1:75; said silver halide grains being spectrally sensitized with a photographic spectral sensitizing methine dye.
Inventors
- 👤 Allan G Millikan
- 👤 Mary Jane W Brizee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:14
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C1/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A PHOTOGAPHIC SILVER HALIDE EMULSION COMPRISING LIGHTSENSITIVE SILVER HALIDE GRAINS HAVING AN AVERAGE GRAIN SIZE UP TO ABOUT .2 MICRON, SAID SILVER HALIDE GRAINS BEING SENSITIZED WITH THE COMBINATION OF A GOLD SENSITIZED AT A CONCENTRATION OF ABOUT 50 TO 200 MILLIGRAMS GOLD PER MOLE OF SILVER, AND A SULFUR SENSITIZER AT A WEIGHT RATIO OF SULFUR TO GOLD OF FROM 1:15 TO 1:17, AND, SAID SILVER HALIDE BEING SPECTRALLY SENSITIZED WITH A DYE HAVING ONE OF THE FOLLOWING FORMULAS:
Claim 2
Dependent Claim
80 words
A PHOTOGAPHIC SILVER HALIDE EMULSION COMPRISING LIGHTSENSITIVE SILVER HALIDE GRAINS HAVING AN AVERAGE GRAIN SIZE UP TO ABOUT .2 MICRON, SAID SILVER HALIDE GRAINS BEING SENSITIZED WITH THE COMBINATION OF A GOLD SENSITIZED AT A CONCENTRATION OF ABOUT 50 TO 200 MILLIGRAMS GOLD PER MOLE OF SILVER, AND A SULFUR SENSITIZER AT A WEIGHT RATIO OF SULFUR TO GOLD OF FROM 1:15 TO 1:17, AND, SAID SILVER HALIDE BEING SPECTRALLY SENSITIZED WITH A DYE HAVING ONE OF THE FOLLOWING FORMULAS:
Claim 3
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the Following formula:
Claim 4
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the Following formula:
Claim 5
Dependent Claim
39 words
A light-sensitive photographic silver halide emulsion as defined in claim 2 wherein said dye is supersensitized with at least one supersensitizer selected from a polynuclear aromatic compound containing at least one sulfo group and a silver halide reducing agent.
Claim 6
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the following formula:
Claim 7
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the following formula:
Claim 8
Dependent Claim
39 words
A light-sensitive photographic silver halide emulsion as defined in claim 4 wherein said dye is supersensitized with at least one supersensitizer selected from a polynuclear aromatic compound containing at least one sulfo group and a silver halide reducing agent.
Claim 9
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the following formula:
Claim 10
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the following formula:
Claim 11
Dependent Claim
39 words
A light-sensitive photographic silver halide emulsion as defined in claim 6 wherein said dye is supersensitized with at least one supersensitizer selected from a polynuclear aromatic compound containing at least one sulfo group and a silver halide reducing agent.
Claim 12
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the following formula:
Claim 13
Dependent Claim
80 words
A photographic silver halide emulsion comprising light-sensitive silver halide grains having an average grain size up to about .2 micron; said silver halide grains being sensitized with the combination of a gold sensitizer, at a concentration of about 50 to 200 milligrams gold per mole of silver, and a sulfur sensitizer at a weight ratio of sulfur to gold of from 1:15 to 1: 75; and, said silver halide being spectrally sensitized with a methine dye having the following formula:
Claim 14
Dependent Claim
39 words
A light-sensitive photographic silver halide emulsion as defined in claim 8 wherein said dye is supersensitized with at least one supersensitizer selected from a polynuclear aromatic compound containing at least one sulfo group and a silver halide reducing agent.
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |