US5702833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic electroluminescent element
Assignee: Ricoh Co Ltd
•
Filing: 1995-08-14
•
Granted: 1997-12-30
•
Expires: 2015-08-14
Abstract
Abstract An organic electroluminescent element having an anode, a cathode, and an organic compound layer provided between the electrodes, the organic compound layer containing an oxadiazole compound of formula (I) or (II): ##STR1## wherein A 1 to A 6 are each an aromatic hydrocarbon group or an aromatic heterocyclic group which may have a substituent; X is a hydrogen atom or a fluorine atom; R 1 and R 2 are each a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent, or an alkoxyl group which may have a substituent; and R 3 , R 4 and R 5 are each a hydrogen atom, a halogen atom, an alkyl group which may have a substituent, an alkoxyl group which may have a substituent, or hydroxyl group.
Inventors
- 👤 Kazukiyo Nagai
- 👤 Chihaya Adachi
- 👤 Nozomu Tamoto
- 👤 Yohta Sakon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
H; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H05; H05B; H05B33/00; H05B33/12; H05B33/14; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
An organic electroluminescent element comprising an anode, a cathode, and an organic compound layer provided between said anode and said cathode, said organic compound layer comprising an oxadiazole compound of formula (I) in an election-transporting effective amount: ##STR93## wherein A 1 to A 4 are each independently an aromatic hydrocarbon group which may have a substituent, or an aromatic heterocyclic group which may have a substituent; X is a hydrogen atom or a fluorine atom; and R 1 and R 2 are each independently a hydrogen atom, a halogen atom, or an alkyl group having 1 to 12 carbon atoms which may have a substituent, or an alkoxyl group having 1 to 12 carbon atoms which may have a substituent.
Claim 2
Dependent Claim
120 words
An organic electroluminescent element comprising an anode, a cathode, and an organic compound layer provided between said anode and said cathode, said organic compound layer comprising an oxadiazole compound of formula (I) in an election-transporting effective amount: ##STR93## wherein A 1 to A 4 are each independently an aromatic hydrocarbon group which may have a substituent, or an aromatic heterocyclic group which may have a substituent; X is a hydrogen atom or a fluorine atom; and R 1 and R 2 are each independently a hydrogen atom, a halogen atom, or an alkyl group having 1 to 12 carbon atoms which may have a substituent, or an alkoxyl group having 1 to 12 carbon atoms which may have a substituent.
Claim 3
Dependent Claim
18 words
The organic electroluminescent element as claimed in claim 1, wherein X in formula (I) represents a fluorine atom.
Claim 4
Dependent Claim
51 words
The organic electroluminescent element as claimed in claim 1, wherein said organic compound layer comprises a plurality of overlaid layers which layers comprise a luminescent layer and at least one electron-transporting layer comprising said oxadiazole compound of formula (I), which electron-transporting layer is provided between said luminescent layer and said cathode.
Claim 5
Dependent Claim
104 words
The organic electroluminescent element as claimed in claim 1, wherein said organic compound layer comprises an oxadiazole compound of formula (I)-1: ##STR94## wherein A 1 to A 4 are each independently an aromatic hydrocarbon group which may have a substituent, or an aromatic heterocyclic group which may have a substituent; X is a hydrogen atom or a fluorine atom; and R 1 and R 2 are each independently a hydrogen atom, a halogen atom, or an alkyl group having 1 to 12 carbon atoms which may have a substituent, or an alkoxyl group having 1 to 12 carbon atoms which may have a substituent.
References Cited (Backward Citations)
JPH07179394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-29 | 2001-06-30 | 2001-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-29 | 2005-06-30 | 2005-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-29 | 2009-06-30 | 2009-12-30 | $7700.00 | Window Closed / Lapsed |