US4356429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic electroluminescent cell
Assignee: Eastman Kodak Co
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Filing: 1980-07-17
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Granted: 1982-10-26
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Expires: 2000-07-17
Abstract
Abstract An organic electroluminescent cell is disclosed comprising a luminescent zone between two electrodes, wherein a hole-injecting zone comprising a porphyrinic compound is disposed between the luminescent zone and the anode electrode.
Inventors
- 👤 Ching W. Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:34
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/20; H10; H10K; H10K50/00; H10K50/10; H10K50/17; H10K50/11; H10K85/00; H10K85/30; H10K85/311; H10K85/60; H10K85/615; H10K85/621
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
In an electroluminescent cell including an anode electrode, a cathode electrode, and a luminescent zone between said electrodes comprising an organic luminescent agent and a binder having a breakdown field strength of at least about 10 5 volt/cm, the improvement comprising, between said luminescent zone and said anode electrode, a hole-injecting zone comprising a layer of a porphyrinic compound.
Claim 2
Dependent Claim
59 words
In an electroluminescent cell including an anode electrode, a cathode electrode, and a luminescent zone between said electrodes comprising an organic luminescent agent and a binder having a breakdown field strength of at least about 10 5 volt/cm, the improvement comprising, between said luminescent zone and said anode electrode, a hole-injecting zone comprising a layer of a porphyrinic compound.
Claim 3
Dependent Claim
14 words
A cell as defined in claim 1, wherein said porphyrinic compound is a phthalocyanine.
Claim 4
Dependent Claim
15 words
A cell as defined in claim 1, wherein said porphyrinic compound is a metal phthalocyanine.
Claim 5
Dependent Claim
21 words
A cell as defined in claim 1, 2 or 3, wherein said binder is a polymeric solvent for said luminescent agent.
Claim 6
Dependent Claim
42 words
A cell as defined in claim 1, wherein said luminescent zone includes a second luminescent agent different from said organic luminescent agent, said second agent being capable of shifting the wavelength of the light emission from that of the first luminescent agent.
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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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |