Patent US4495276A successfully refreshed from Google Patents.
US4495276A
Expired / Lapsed
US
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Photosensitive materials having improved antistatic property
Assignee: Fujifilm Holdings Corp
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Filing: 1981-04-13
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Granted: 1985-01-22
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Expires: 2001-04-13
Abstract
Abstract A silver halide photosensitive material having an improved antistatic property is disclosed, comprising a base support having thereon an electrically conductive layer comprised of fine particles of a crystalline metal oxide selected from the group consisting of ZnO, TiO 2 , ZrO 2 , SnO 2 , Al 2 O 3 , In 2 O 3 , SiO 2 , MgO, BaO and MoO 3 or a composite oxide thereof dispersed in a binder, the light scattering efficiency of said photosensitive material being 50% or less. The electrically conductive layer gives excellent antistatic properties even under low humidity preventing the generation of static charges without damaging photographic properties of the silver halide photosensitive material.
Inventors
- 👤 Masaaki Takimoto
- 👤 Takashi Saida
- 👤 Masataka Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:44
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38; G03C1/385; G03C1/76; G03C1/85; G03C1/853
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
140 words
A silver halide photosensitive element having an improved antistatic property comprising a silver halide layer, a base support and an electrically conductive layer on said base support, said electrically conductive layer comprising fine particles of a crystalline metal oxide selected from the group consisting of ZnO, TiO 2 , SnO 2 , Al 2 O 3 , ZrO 3 , In 2 O 3 , SiO 2 , MgO, BaO and MoO 3 or a composite oxide thereof dispersed in an organic film-forming binder, said electrically conductive layer being formed by dispersing said fine particles of a crystalline metal oxide in said binder and coating the same, the light-scattering efficiency of said photosensitive material being 50% or less, wherein said electrically conductive layer has a surface resistivity of 10 11 Ω or less at 25° C. under 25% relative humidity.
Claim 2
Dependent Claim
140 words
A silver halide photosensitive element having an improved antistatic property comprising a silver halide layer, a base support and an electrically conductive layer on said base support, said electrically conductive layer comprising fine particles of a crystalline metal oxide selected from the group consisting of ZnO, TiO 2 , SnO 2 , Al 2 O 3 , ZrO 3 , In 2 O 3 , SiO 2 , MgO, BaO and MoO 3 or a composite oxide thereof dispersed in an organic film-forming binder, said electrically conductive layer being formed by dispersing said fine particles of a crystalline metal oxide in said binder and coating the same, the light-scattering efficiency of said photosensitive material being 50% or less, wherein said electrically conductive layer has a surface resistivity of 10 11 Ω or less at 25° C. under 25% relative humidity.
Claim 3
Dependent Claim
29 words
A silver halide photosensitive element as claimed in claim 1, wherein said crystalline metal oxide is selected from the group consisting of ZnO, TiO 2 and SnO 2 .
Claim 4
Dependent Claim
50 words
A silver halide photsensitive element as claimed in any of claims 1 or 2, wherein said crystalline metal oxide includes a hetero atom selected from the group consisting of Al and In for ZnO; Nb and Ta for TiO 2 ; and Sb, Nb and halogens for SnO 2 .
Claim 5
Dependent Claim
28 words
A silver halide photosensitive element as claimed in claim 3, wherein said hetero atom is contained in said metal oxide in a range of 0.01 to 30 mol%.
Claim 6
Dependent Claim
28 words
A silver halide photosensitive element as claimed in claim 4, wherein said hetero atom is contained in said metal oxide in a range of 0.1 to 10 mol%.
Claim 7
Dependent Claim
20 words
A silver halide photosensitive element as claimed in claim 1, wherein said surface resistivity is 10 9 Ω or less.
Claim 8
Dependent Claim
38 words
A silver halide photosensitive element as claimed in any of claims 1 or 2, wherein said fine particles of crystalline metal oxide are contained in an amount of 0.05 to 20 g per square meter of photosensitive element.
Claim 9
Dependent Claim
29 words
A silver halide photosensitive element as claimed in claim 7, wherein said particles are contained in an amount of 0.1 to 10 g per square meter of photosensitive element.
Claim 10
Dependent Claim
24 words
A silver halide photosensitive element as claimed in claim 1, wherein said electrically conductive particles have a particle size of about 0.5μ or less.
Claim 11
Dependent Claim
24 words
A silver halide photosensitive element as claimed in claim 1, wherein said electrically conductive particles have a particle size of about 0.2μ or less.
Claim 12
Dependent Claim
22 words
A silver halide photosensitive element as claimed in claim 9, wherein said binder is an electrically conductive high molecular weight organic substance.
Claim 13
Dependent Claim
22 words
A silver halide photosensitive element as claimed in claim 10, wherein said binder is an electrically conductive high molecular weight organic substance.
Claim 14
Dependent Claim
22 words
A silver halide photosensitive element as claimed in claim 9, wherein said binder has a refractive index of about 1.4 to 1.6.
Claim 15
Dependent Claim
22 words
A silver halide photosensitive element as claimed in claim 10, wherein said binder has a refractive index of about 1.4 to 1.6.
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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |