US4666802A
Expired / Lapsed
US
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Photoconductive elements sensitive to infrared radiation having a bromoindium phthalocyanine pigment
Assignee: Eastman Kodak Co
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Filing: 1986-07-16
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Granted: 1987-05-19
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Expires: 2006-07-16
Abstract
Abstract A novel C-centered monoclinic bromoindium phthalocyanine pigment is obtained by reacting high-purity diiminoisoindoline with indium tribromide in the solvent, 1-methyl-2-pyrrolidinone. Multiactive photoconductive elements prepared by dispersion-coating a charge-generation layer containing this pigment have high sensitivity to near-infrared radiation.
Inventors
- 👤 Yann Hung
- 👤 Michael T. Regan
- 👤 William J. Staudenmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:34
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696; C; C09; C09B; C09B47/00; C09B47/04; C09B47/06; C09B47/073; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A multiactive photoconductive element comprising an electrically conductive support, a charge-generation layer and a charge-transport layer, wherein the charge-generation layer comprises dispersion-coated bromoindium phthalocyanine prepared by the reaction of high-purity diiminoisoindoline with indium bromide in the presence of 1-methyl-2-pyrrolidinone as the reaction solvent.
Claim 2
Dependent Claim
43 words
A multiactive photoconductive element comprising an electrically conductive support, a charge-generation layer and a charge-transport layer, wherein the charge-generation layer comprises dispersion-coated bromoindium phthalocyanine prepared by the reaction of high-purity diiminoisoindoline with indium bromide in the presence of 1-methyl-2-pyrrolidinone as the reaction solvent.
Claim 3
Dependent Claim
13 words
An element according to claim 1 wherein the indium bromide is indium tribromide.
Claim 4
Dependent Claim
33 words
A photoconductive element comprising an electrically conductive support and a photoconductive layer which contains bromoindium phthalocyanine pigment having X-ray diffractogram major peaks at Bragg angles (2θ) of 7.4°, 16.7°, 25.3°, 27.5° and 28.4°.
Claim 5
Dependent Claim
33 words
A photoconductive element comprising an electrically conductive support and a photoconductive layer which contains bromoindium phthalocyanine pigment having X-ray diffractogram major peaks at Bragg angles (2θ) of 7.4°, 16.7°, 25.3°, 27.5° and 28.4°.
Claim 6
Dependent Claim
43 words
A multiactive photoconductive element of claim 3 comprising an electrically conductive support, a charge transport layer and a charge generation layer which contains a bromoindium phthalocyanine pigment having X-ray diffractogram major peaks at Bragg angles (2θ) of 7.4°, 16.7°, 25.3°, 27.5° and 28.4°.
Claim 7
Dependent Claim
15 words
A multiactive photoconductive element according to claim 4 wherein the bromoindium phthalocyanine pigment is dispersion-coated.
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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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |