US3852067A
Expired / Lapsed
US
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Photosensitive element with silver halide, a semiconductor and a sensitizing dye
Assignee: Polaroid Corp
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Filing: 1973-03-15
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Granted: 1974-12-03
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Expires: 1993-03-15
Abstract
Abstract The present invention relates to photography and, more particularly, to a novel radiation recording photographic element which comprises a photosensitive element which includes, in combination, a particulate dispersion of photosensitive crystals, preferably, photosensitive silver halide crystals adapted to be reduced to silver, upon contact with a silver halide reducing agent, as a function of the crystals' exposure to incident actinic electromagnetic radiation, having associated therewith a sensitizing dye and an oxygen-free inorganic semiconductor which includes one or more elements from Groups IIIa to VIa, inclusive, of the Periodic Table, possessing an atomic number >/= 13 and </= 81, adapted to donate electrons to the photosensitive crystals as a function of the exposure of the element to incident actinic electromagnetic radiation.
Inventors
- 👤 B Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:20
CPC Classifications
G; G03; G03C; G03C8/00; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/705
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
125 words
A PHOSTOSENSITIVE ELEMENT WHICH COMPRISES A PARTICULATE DISPERSION OF SILVER HALIDE CRYSTALS ADAPTED TO BE REDUCED TO SILVER UPON CONTACT WITH A SILVER HALIDE REDUCING AGENT, AS A FUNCTION OF SAID CRYSTALS'' EXPOSURE TO INCIDENT ELECTROMAGNETIC RADIATION ACTINIC THERETO, HAVING ASSOCIATED THEREWITH IN ELECTRON DONATING RELATIONSHIP A SENSITIZING DYE AND AN INORGANIC, SUBSTANTIALLY WATER-INSOLUBLE OXYGEN-FREE SEMICONDUCTOR, SAID SEMICONDUCTOR COMPRISING ONE OR MORE ELEMENTS FROM GROUP 111A TO VIA, INCLUSIVE, OF THE PERIODIC TABLE OF ELEMENTS, POSSESSING AN ATOMIC NUMBER 13 AND 81, WHEREIN SAID INORGANIC SEMICONDUCTOR IS DISPOSED IN ELECTRON-DONATING RELATIONSHIP WITH SAID SENSITIZING DYE, SAID DYE AND SEMICONDUCTOR ADAPTED TO DONATE ELECTRONS TO SAID SILVER HALIDE CRYSTALS AS A FUNCTION OF THE EXPOSURE OF SAID ELEMENT TO INCIDENT ELECTROMAGNETIC RADIATION ACTINIC TO SAID ELEMENT.
Claim 2
Dependent Claim
125 words
A PHOSTOSENSITIVE ELEMENT WHICH COMPRISES A PARTICULATE DISPERSION OF SILVER HALIDE CRYSTALS ADAPTED TO BE REDUCED TO SILVER UPON CONTACT WITH A SILVER HALIDE REDUCING AGENT, AS A FUNCTION OF SAID CRYSTALS'' EXPOSURE TO INCIDENT ELECTROMAGNETIC RADIATION ACTINIC THERETO, HAVING ASSOCIATED THEREWITH IN ELECTRON DONATING RELATIONSHIP A SENSITIZING DYE AND AN INORGANIC, SUBSTANTIALLY WATER-INSOLUBLE OXYGEN-FREE SEMICONDUCTOR, SAID SEMICONDUCTOR COMPRISING ONE OR MORE ELEMENTS FROM GROUP 111A TO VIA, INCLUSIVE, OF THE PERIODIC TABLE OF ELEMENTS, POSSESSING AN ATOMIC NUMBER 13 AND 81, WHEREIN SAID INORGANIC SEMICONDUCTOR IS DISPOSED IN ELECTRON-DONATING RELATIONSHIP WITH SAID SENSITIZING DYE, SAID DYE AND SEMICONDUCTOR ADAPTED TO DONATE ELECTRONS TO SAID SILVER HALIDE CRYSTALS AS A FUNCTION OF THE EXPOSURE OF SAID ELEMENT TO INCIDENT ELECTROMAGNETIC RADIATION ACTINIC TO SAID ELEMENT.
Claim 3
Dependent Claim
25 words
A photosensitive element as defined in claim 1 wherein said dye possesses a conduction band energy level above that possessed by said silver halide crystals.
Claim 4
Dependent Claim
26 words
A photosensitive element as defined in claim 2 wherein said silver halide crystals are selected from a group consisting of silver iodobromide and silver iodochlorobromide crystals.
Claim 5
Dependent Claim
16 words
A photosensitive element as defined in claim 2 wherein said dye is a cyanine sensitizing dye.
Claim 6
Dependent Claim
36 words
A photosensitive element as defined in claim 4 wherein said cyanine sensitizing dye is an optical sensitizing dye adapted to extend the range of the electromagnetic radiation spectrum to which said silver halide crystals are responsive.
Claim 7
Dependent Claim
111 words
A photosensitive element as defined in claim 1 which comprises a particulate dispersion of silver halide crystals adapted to be reduced to silver by contact with a silver halide reducing agent, as a function of the exposure of said element to incident electromagnetic radiation actinic to said element, having associated therewith an electrondonating cyanine sensitizing dye and a particulate dispersion of an inorganic electron donating semiconductor, each of said cyanine dye and semiconductor associated with said silver halide crystals in electron donating relationship and adapted to donate electrons to said silver halide crystals as a function of said exposure of said element to said incident electromagnetic radiation actinic to said element.
Claim 8
Dependent Claim
59 words
A photosensitive element as defined in claim 6 wherein said inorganic semiconductor is disposed in electrondonating relationship with said cyanine dye and is adapted to donate electrons from said semiconductor to said dye as a function of the donating of electrons from said dye to said silver halide crystals upon exposure of said element to said incident actinic radiation.
Claim 9
Dependent Claim
36 words
A photosensitive element as defined in claim 7 wherein said cyanine dye is a spectral sensitizing cyanine dye adapted to extend the range of the electromagnetic radiation spectrum at which said silver halide crystals are responsive.
Claim 10
Dependent Claim
28 words
A photosensitive element as defined in claim 8 wherein said spectral sensitizing cyanine dye possesses a conduction band energy level above that possessed by said silver halide crystals.
Claim 11
Dependent Claim
27 words
A photosensitive element as defined in claim 9 wherein said inorganic semiconductor possesses a conduction band energy level above that possessed by said spectral sensitizing cyanine dye.
Claim 12
Dependent Claim
32 words
A photosensitive element as defined in claim 10 wherein said cyanine spectral sensitizing dye possesses a conduction band energy level above the conduction band gap energy level of said silver halide crystals.
Claim 13
Dependent Claim
29 words
A photosensitive element as defined in claim 11 wherein said inorganic semiconductor possesses a conduction band energy level above the conduction band energy level of said silver halide crystals.
Claim 14
Dependent Claim
26 words
A photosensitive element as defined in claim 10 wherein said silver halide crystals are selected from a group consisting of silver iodobromide and silver iodochlorobromide crystals.
Claim 15
Dependent Claim
26 words
A photosensitive element as defined in claim 13 wherein said silver halide crystals, said cyanine dye and said inorganic semiconductor are disposed in a polymeric matrix.
Claim 16
Dependent Claim
14 words
A photosensitive element as defined in claim 14 wherein said polymeric matrix comprises gelatin.
Claim 17
Dependent Claim
16 words
A photosensitive element as defined in claim 6 including associated therewith a silver halide developing agent.
Claim 18
Dependent Claim
69 words
A photosensitive element as defined in claim 6 including associated therewith a photographic diffusion transfer process image-forming material adapted to diffuse as a function of the exposure of said silver halide crystals to a receptor adapted to receive diffusion transfer process image-forming material diffusing thereto to provide to said receptor an image as a function of a point-to-point degree of the photosensitive element''s exposure to said incident actinic radiation.
Claim 19
Dependent Claim
23 words
A photosensitive element as defined in claim 17 wherein said diffusion transfer process image-forming material comprises a diffusion transfer process dye imageforming material.
Claim 20
Dependent Claim
37 words
A photosensitive element as defined in claim 18 wherein said diffusion transfer process dye image-forming material is adapted to provide an imagewise distribution of diffusible dye as a function of the photoexposed areas of said photosensitive element.
Claim 21
Dependent Claim
37 words
A photosensitive element as defined in claim 18 wherein said diffusion transfer process dye image-forming material is adapted to provide an imagewise distribution of diffusible dye as a function of the unexposed areas of said photosensitive element.
Claim 22
Dependent Claim
58 words
A photosensitive element as defined in claim 20 wherein said diffusion transfer process dye image-forming material is a dye which is a silver halide reducing agent adapted to reduce silver halide crystals to silver as a function of the exposure thereof to provide an imagewise distribution of diffusible dye in terms of unexposed areas of said photosensitive element.
Claim 23
Dependent Claim
15 words
A photosensitive element as defined in claim 6 wherein said inorganic semiconductor is aluminum arsenide.
Claim 24
Dependent Claim
14 words
A photosensitive element as defined in claim 4 wherein said cyanine sensitizing dye is
Claim 25
Dependent Claim
85 words
A photosensitive element which comprises a particulate distribution of photosensitive silver halide crystals having associated therewith sensitizing dye and a particulate dispersion of inorganic substantially water-insoluble semiconductor adapted to amplify the photosensitivity of said photosensitive crystals to incident actinic radiation, said semiconductor comprising one or more elements from Group IIIa to VIa, inclusive, of the Periodic Table of Elements, possessing an atomic number > or = 13 and < or = 81, wherein said inorganic semiconductor is disposed in electron-donating relationship with said sensitizing dye.
Claim 26
Dependent Claim
85 words
A photosensitive element which comprises a particulate distribution of photosensitive silver halide crystals having associated therewith sensitizing dye and a particulate dispersion of inorganic substantially water-insoluble semiconductor adapted to amplify the photosensitivity of said photosensitive crystals to incident actinic radiation, said semiconductor comprising one or more elements from Group IIIa to VIa, inclusive, of the Periodic Table of Elements, possessing an atomic number > or = 13 and < or = 81, wherein said inorganic semiconductor is disposed in electron-donating relationship with said sensitizing dye.
Claim 27
Dependent Claim
34 words
A photosensitive element as defined in claim 24 wherein said photosensitive crystals exhibIt increased photosensitivity to incident actinic radiation within the range of the electromagnetic radiation spectrum to which said crystals exhibit inherent sensitivity.
Claim 28
Dependent Claim
34 words
A photosensitive element as defined in claim 24 wherein said photosensitive crystals exhibit photosensitivity to incident actinic radiation within the range of the electromagentic radiation spectrum to which said crystals exhibit no inherent sensitivity.
Claim 29
Dependent Claim
20 words
A photosensitive element as defined in claim 26 wherein said photosensitive crystals exhibit photosensitivity throughout the visible electromagnetic radiation spectrum.
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |