US5457013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging element comprising a transparent magnetic layer and an electrically-conductive layer containing particles of a metal antimonate
Assignee: Eastman Kodak Co
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Filing: 1994-10-17
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Granted: 1995-10-10
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Expires: 2014-10-17
Abstract
Abstract Imaging elements, such as photographic, electrostatographic and thermal imaging elements, are comprised of a support, an image-forming layer, a transparent magnetic layer comprising magnetic particles dispersed in a film-forming binder and an electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate. Use of metal antimonate particles provides a controlled degree of electrical conductivity and beneficial chemical, physical and optical properties which adapt the electrically-conductive layer for such purposes as providing protection against static or serving as an electrode which takes part in an image-forming process.
Inventors
- 👤 Paul A. Christian
- 👤 Charles C. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/426; G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/853; G03C5/00; G03C5/12; G03C5/14; G03G; G03G5/00; G03G5/10; G03G5/104; G03G5/14; G03G5/142; G03G5/144; G03G5/147; G03G5/14704; B41M5/44; G03C11/00; G03C11/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
49 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, a transparent magnetic layer comprising magnetic particles dispersed in a film-forming binder and an electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate.
Claim 2
Dependent Claim
49 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, a transparent magnetic layer comprising magnetic particles dispersed in a film-forming binder and an electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate.
Claim 3
Dependent Claim
33 words
An imaging element as claimed in claim 1, wherein the coverage of magnetic particles in said transparent magnetic layer is in the range of from about 0.001 to about 10 g/m 2 .
Claim 4
Dependent Claim
33 words
An imaging element as claimed in claim 1, wherein the coverage of magnetic particles in said transparent magentic layer is in the range of from about 0.01 to about 1 g/m 2 .
Claim 5
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said transparent magnetic layer overlies said electrically-conductive layer.
Claim 6
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said electrically-conductive layer overlies said transparent magnetic layer.
Claim 7
Dependent Claim
24 words
An imaging element as claimed in claim 1, wherein said transparent magnetic layer and said electrically-conductive layer are on opposite sides of said support.
Claim 8
Dependent Claim
18 words
An imaging element as claimed in claim 1, wherein said transparent magnetic layer is interposed between image-forming layers.
Claim 9
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said electrically-conductive layer is interposed between image-forming layers.
Claim 10
Dependent Claim
27 words
An imaging element as claimed in claim 1, wherein said transparent magnetic layer has a thickness in the range of from about 0.05 to about 10 micrometers.
Claim 11
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said magnetic particles are cobalt-modified gamma-iron oxide particles.
Claim 12
Dependent Claim
31 words
An imaging element as claimed in claim 1, wherein the volume fraction of said metal antimonate particles is from about 20 to about 80% of the volume of said electrically-conductive layer.
Claim 13
Dependent Claim
30 words
An imaging element as claimed in claim 1 wherein the dry weight of said electrically-conductive layer is in the range of from about 0.1 to about 10 g/m 2 .
Claim 14
Dependent Claim
44 words
An imaging element as claimed in claim 1, wherein said metal antimonate is of the formula M.sup.+2 Sb.sup.+5.sub.2 O.sub.6 wherein M +2 is Zn +2 , Ni +2 , Mg +2 , Fe +2 , Cu +2 , Mn +2 or Co +2 .
Claim 15
Dependent Claim
41 words
An imaging element as claimed in claim 1, wherein said metal antimonate is of the formula: M.sup.+3 Sb.sup.+5 O.sub.4 wherein M +3 is In +3 , Al +3 , Sc +3 , Cr +3 , Fe +3 or Ga +3 .
Claim 16
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said metal antimonate has the formula ZnSb.sub.2 O.sub.6.
Claim 17
Dependent Claim
16 words
An imaging element as claimed in claim 1, wherein said metal antimonate has the formula InSbO.sub.4.
Claim 18
Dependent Claim
62 words
An imaging element as claimed in claim 1, wherein said support is a transparent polymeric film, said image-forming layer is comprised of silver halide grains dispersed in gelatin, said magnetic particles are cobalt-modified gamma-iron oxide particles, said film-forming binder in said electrically-conductive layer is gelatin, and said metal antimonate particles are colloidal particles of ZnSb 2 O 6 or InSbO 4 .
Claim 19
Dependent Claim
16 words
An imaging element as claimed in claim 1, wherein said support is a cellulose acetate film.
Claim 20
Dependent Claim
21 words
An imaging element as claimed in claim 1, wherein said support is a poly(ethylene terephthalate) film or a poly(ethylene naphthalate) film.
Claim 21
Dependent Claim
17 words
An imaging element as claimed in claim 1, wherein said support is a glow discharge treated support.
Claim 22
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said film-forming binder in said electrically-conductive layer is a vinylidene chloride based terpolymer latex.
Claim 23
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said film-forming binder in said electrically-conductive layer is a polymethylmethacrylate.
Claim 24
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said film-forming binder in said electrically-conductive layer is hydroethylcellulose, cellulose diacetate or cellulose triacetate.
Claim 25
Dependent Claim
19 words
An imaging element as claimed in claim 1, wherein said film-forming binder in said electrically-conductive layer is a polyurethane.
Claim 26
Dependent Claim
91 words
An imaging element for use in an image-forming process, said imaging element comprising a support having on one side thereof an image-forming layer and a first electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate and having on the opposite side thereof a transparent magnetic layer comprising magnetic particles dispersed in a film-forming binder and a second electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate positioned either over or under said transparent magnetic layer.
Claim 27
Dependent Claim
91 words
An imaging element for use in an image-forming process, said imaging element comprising a support having on one side thereof an image-forming layer and a first electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate and having on the opposite side thereof a transparent magnetic layer comprising magnetic particles dispersed in a film-forming binder and a second electrically-conductive layer comprising a dispersion in a film-forming binder of fine particles of an electronically-conductive metal antimonate positioned either over or under said transparent magnetic layer.
Claim 28
Dependent Claim
18 words
An imaging element as claimed in claim 25, wherein said image-forming layer is a silver halide emulsion layer.
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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) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |