US5300394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersions for imaging systems
Assignee: Eastman Kodak Co
•
Filing: 1992-12-16
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Granted: 1994-04-05
•
Expires: 2012-12-16
Abstract
Abstract A solid particle aqueous dispersion of a compound useful in imaging is prepared by milling an aqueous slurry of the compound in the presence of a fluorosurfactant. The resulting dispersion has improved stability to particle growth.
Inventors
- 👤 David D. Miller
- 👤 Mary C. Brick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C1/00; G03C1/005; G03C1/06; G03C1/38; G03C1/385
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
31 words
A process for preparing a solid particle dispersion of a substantially water-insoluble compound useful in imaging, comprising milling an aqueous slurry of said compound in the presence of a fluorinated surfactant.
Claim 2
Dependent Claim
31 words
A process for preparing a solid particle dispersion of a substantially water-insoluble compound useful in imaging, comprising milling an aqueous slurry of said compound in the presence of a fluorinated surfactant.
Claim 3
Dependent Claim
14 words
A process in accordance with claim 1, wherein the fluorinated surfactant is partially fluorinated.
Claim 4
Dependent Claim
14 words
A process in accordance with claim 1, wherein the fluorinated surfactant is fully fluorinated.
Claim 5
Dependent Claim
76 words
A process in accordance with claim 1, wherein the fluorinated surfactant has the formula: (R.sub.f).sub.n --(A).sub.m --X where R f is a fluorine substituted alkyl, alkenyl, or aryl group of at least 3 carbons, A is a divalent, trivalent, or tetravalent linking group, and X is an--SO 3 M, OSO 3 M, or COOM group, where M is a hydrogen atom or a cation, n is 1, 2, or 3 and m is 0 or 1.
Claim 6
Dependent Claim
16 words
The process of claim 1, wherein at least one additional surfactant is added to the mill.
Claim 7
Dependent Claim
12 words
The process of claim 5, wherein said additional surfactant is a fluorosurfactant.
Claim 8
Dependent Claim
40 words
The process of claim 1, which further comprises adding the resulting dispersion to an aqueous medium containing at least one component selected from the group consisting of fluorinated surfactants, anionic, nonionic, zwitterionic or cationic non-fluorinated surfactants, and water soluble polymers.
Claim 9
Dependent Claim
26 words
The process of claim 7, wherein said component is polyvinyl pyrrolidone, polyvinyl alcohol, polyethylene oxide, gelatin, a copolymer of polyvinyl pyrrolidone and acrylic acid, or polyacrylamide.
Claim 10
Dependent Claim
45 words
The process of claim 1 where the compound useful in imaging is selected from the group consisting of couplers, DI(A)R's, sensitizing dyes, filter dyes, UV absorbers, antioxidants, oxidized developer scavengers, trimmer dyes, anti-stain agents, anti-face agents, silver halide developing agents, toners and pigments for electrophotography.
Claim 11
Dependent Claim
9 words
A product produced by the process of claim 1.
Claim 12
Dependent Claim
13 words
A photographic element comprising a dispersion produced by the process of claim 1.
Claim 13
Dependent Claim
21 words
The process of claim 1, wherein the compound useful in imaging selected from the group consisting of sensitizing dyes and antifoggants.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |