US5466567A
Expired / Lapsed
US
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Imaging element comprising an electrically-conductive layer containing conductive fine particles, a film-forming hydrophilic colloid and pre-crosslinked gelatin particles
Assignee: Eastman Kodak Co
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Filing: 1994-10-28
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Granted: 1995-11-14
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Expires: 2014-10-28
Abstract
Abstract Imaging elements, such as photographic, electrostatographic and thermal imaging elements, are comprised of a support, an image-forming layer and an electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive fine particles and pre-crosslinked gelatin particles. The combination of hydrophilic colloid, electrically-conductive fine particles and pre-crosslinked gelatin 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
- 👤 Charles C. Anderson
- 👤 Yongcai Wang
- 👤 James L. Bello
- 👤 Ibrahim M. Shalhoub
- 👤 Douglas D. Corbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03G; G03G5/00; G03G5/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
37 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, and an electrically-conductive layer; said electrically-conductive layer comprising electrically-conductive fine particles, a film-forming hydrophilic colloid and pre-crosslinked gelatin particles.
Claim 2
Dependent Claim
37 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, and an electrically-conductive layer; said electrically-conductive layer comprising electrically-conductive fine particles, a film-forming hydrophilic colloid and pre-crosslinked gelatin particles.
Claim 3
Dependent Claim
16 words
An imaging element as claimed in claim 1, wherein said electrically-conductive fine particles are polymer particles.
Claim 4
Dependent Claim
16 words
An imaging element as claimed in claim 1, wherein said electrically-conductive fine particles are metal-containing particles.
Claim 5
Dependent Claim
15 words
An imaging element as claimed in claim 1, wherein said film-forming hydrophilic colloid is gelatin.
Claim 6
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said electrically-conductive fine particles have an average particle size of less than 0.3 micrometers.
Claim 7
Dependent Claim
23 words
An imaging element as claimed in claim 1 wherein said electrically-conductive fine particles constitute 15 to 35 volume percent of said electrically-conductive layer.
Claim 8
Dependent Claim
23 words
An imaging element as claimed in claim 1, wherein said electrically-conductive fine particles exhibit a powder resistivity of 10 5 ohm-centimeters or less.
Claim 9
Dependent Claim
26 words
An imaging element as claimed in claim 1, wherein said pre-crosslinked gelatin particles have an average particle size of from about 10 to about 1000 nanometers.
Claim 10
Dependent Claim
24 words
An imaging element as claimed in claim 1, wherein said pre-crosslinked gelatin particles have an average particle size of from 20 to 500 nanometers.
Claim 11
Dependent Claim
37 words
An imaging element as claimed in claim 1, wherein said pre-crosslinked gelatin particles are present in said electrically-conductive layer in an amount of from 0.5 to 3 parts per part by weight of said film-forming hydrophilic colloid.
Claim 12
Dependent Claim
27 words
An imaging element as claimed in claim 1, wherein said electrically-conductive layer has a dry weight coverage of from about 100 to about 1500 mg/m 2 .
Claim 13
Dependent Claim
113 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, and an electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and pre-crosslinked gelatin particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said pre-crosslinked gelatin particles having an average particle size of from about 10 to about 1000 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 8 parts per part by weight of said film-forming hydrophilic colloid.
Claim 14
Dependent Claim
113 words
An imaging element for use in an image-forming process; said imaging element comprising a support, an image-forming layer, and an electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and pre-crosslinked gelatin particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said pre-crosslinked gelatin particles having an average particle size of from about 10 to about 1000 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 8 parts per part by weight of said film-forming hydrophilic colloid.
Claim 15
Dependent Claim
17 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are doped metal oxides.
Claim 16
Dependent Claim
19 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are metal oxides containing oxygen deficiencies.
Claim 17
Dependent Claim
19 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are metal nitrides, carbides or borides.
Claim 18
Dependent Claim
19 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are particles of antimony-doped tin oxide.
Claim 19
Dependent Claim
19 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are particles of aluminum-doped zinc oxide.
Claim 20
Dependent Claim
19 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are particles of niobium-doped titanium oxide.
Claim 21
Dependent Claim
20 words
An imaging element as claimed in claim 12, wherein said electrically-conductive metal-containing particles are colloidal particles of a metal antimonate.
Claim 22
Dependent Claim
122 words
A photographic film comprising: (1) a support; (2) an electrically-conductive layer which serves as an antistatic layer overlying said support; and (3) a silver halide emulsion layer overlying said electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and pre-crosslinked gelatin particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said pre-crosslinked gelatin particles having an average particle size of from about 10 to about 1000 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 8 parts per part by weight of said film-forming hydrophilic colloid.
Claim 23
Dependent Claim
122 words
A photographic film comprising: (1) a support; (2) an electrically-conductive layer which serves as an antistatic layer overlying said support; and (3) a silver halide emulsion layer overlying said electrically-conductive layer; said electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and pre-crosslinked gelatin particles; said electrically-conductive metal-containing particles having an average particle size of less than 0.3 micrometers and constituting about 10 to about 50 volume percent of said electrically-conductive layer, and said pre-crosslinked gelatin particles having an average particle size of from about 10 to about 1000 nanometers and being present in said electrically-conductive layer in an amount of from about 0.3 to about 8 parts per part by weight of said film-forming hydrophilic colloid.
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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) | 1998-11-13 | 1999-05-15 | 1999-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-13 | 2003-05-15 | 2003-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-13 | 2007-05-15 | 2007-11-14 | $7700.00 | Window Closed / Lapsed |