US4816290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming solid granular film
Assignee: Fujifilm Holdings Corp
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Filing: 1987-04-09
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Granted: 1989-03-28
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Expires: 2007-04-09
Abstract
Abstract A process of forming a solid granular film is disclosed, which comprises dispersing solid granules into a liquid with the aid of a dispersant, removing the dispersant from the resulting dispersion to suspend the solid granules at the vapor-liquid interface, and transferring the solid granules onto a support, whereby high covering power is attained with respect to solid granules.
Inventors
- 👤 Tatsuo Heki
- 👤 Noriyuki Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:51
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/20; G; G03; G03C; G03C1/00; G03C1/002; G03C1/005; G03C1/035
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A process for forming a solid granular film comprising dispersing solid granules into a solvent in the presence of a dispersant selected from the group consisting of gelatin and surface active agents, removing the dispersant, forming a film containing the solid granules at the vapor-liquid interface between the atmosphere and the dispersion following the removal of the dispersant, and transferring the film containing the solid granules onto a support.
Claim 2
Dependent Claim
69 words
A process for forming a solid granular film comprising dispersing solid granules into a solvent in the presence of a dispersant selected from the group consisting of gelatin and surface active agents, removing the dispersant, forming a film containing the solid granules at the vapor-liquid interface between the atmosphere and the dispersion following the removal of the dispersant, and transferring the film containing the solid granules onto a support.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein said solid granules are at least one of inorganic and organic pigments.
Claim 4
Dependent Claim
14 words
A process according to claim 1, wherein said solid granules are silver halide grains.
Claim 5
Dependent Claim
28 words
A process according to claim 1, wherein said dispersant is a surface active agent which is selected from at least one of polymeric and oligomeric surface active agents.
Claim 6
Dependent Claim
12 words
A process according to claim 1, wherein said dispersant is a gelatin.
Claim 7
Dependent Claim
20 words
A process according to claim 1, wherein said solvent is selected from at least one of water, methanol and acetone.
Claim 8
Dependent Claim
28 words
A process according to claim 1, wherein said film is formed by allowing the dispersion to stand for at least about one minute following removal of the dispersant.
Claim 9
Dependent Claim
21 words
A process according to claim 7, wherein said dispersion is allowed to stand for about three minutes to about twelve hours.
Claim 10
Dependent Claim
68 words
A process for forming a solid granular film of photographic material comprising, dispersing solid silver halide granules into a solvent in the presence of a hydrophilic colloid dispersant, removing the dispersant, forming a film containing the silver halide granules at the vapor-liquid interface between the atmosphere and the dispersion following the removal of the dispersant, and transferring the film containing the silver halide granules onto a photographic support.
Claim 11
Dependent Claim
68 words
A process for forming a solid granular film of photographic material comprising, dispersing solid silver halide granules into a solvent in the presence of a hydrophilic colloid dispersant, removing the dispersant, forming a film containing the silver halide granules at the vapor-liquid interface between the atmosphere and the dispersion following the removal of the dispersant, and transferring the film containing the silver halide granules onto a photographic support.
Claim 12
Dependent Claim
23 words
A process according to claim 9, wherein said hydrophilic colloid is selected from at least one of gelatin, polyvinyl alcohol and carboxymethyl cellulose.
Claim 13
Dependent Claim
20 words
A process according to claim 9, wherein said solvent is selected from at least one of water, methanol and acetone.
Claim 14
Dependent Claim
23 words
A process according to claim 9, wherein said photographic support is selected from the group consisting of polyethylene terephthalate and cellulose triacetate supports.
Claim 15
Dependent Claim
27 words
A process according to claim 9, wherein said film is formed by allowing the dispersion to stand for at least about one minute following removal of dispersant.
Claim 16
Dependent Claim
21 words
A process according to claim 13, wherein said dispersion is allowed to stand for about three minutes to about twelve hours.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |