Patent US5554450A successfully refreshed from Google Patents.
US5554450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic electroluminescent devices with high thermal stability
Assignee: Global OLED Technology LLC
•
Filing: 1995-03-08
•
Granted: 1996-09-10
•
Expires: 2015-03-08
Abstract
Abstract An organic electroluminescent device which includes an anode and a cathode, and an organic electroluminescent element disposed between the anode and cathode. The organic electroluminescent element has at least one hole transporting layer. The hole transport layer includes a polyaromatic amine of the formula: ##STR1## where n is equal to 3, 4, 5, or 6; R 1 is selected from the group consisting of hydrogen, alkyl, aryl and substituted aryl; R 2 is selected from the group consisting of hydrogen, alkyl, aryl and substituted aryl; and R is selected from the group consisting of hydrogen, and alkyl.
Inventors
- 👤 Jianmin Shi
- 👤 Chin H. Chen
- 👤 Steven A. Van Slyke
- 👤 Ching W. Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
An organic electroluminescent device, comprising an anode and a cathode, and an organic electroluminescent element disposed between the anode and cathode, characterized in that the organic electroluminescent element has at least one hole transporting layer; the hole transport layer includes a polyaromatic amine of the formula: ##STR27## where n is equal to 4, 5, or 6; R 1 is selected from the group consisting of alkyl, aryl and substituted aryl; R 2 is selected from the group consisting of alkyl, aryl and substituted aryl; and R is selected from the group consisting of hydrogen and alkyl.
Claim 2
Dependent Claim
96 words
An organic electroluminescent device, comprising an anode and a cathode, and an organic electroluminescent element disposed between the anode and cathode, characterized in that the organic electroluminescent element has at least one hole transporting layer; the hole transport layer includes a polyaromatic amine of the formula: ##STR27## where n is equal to 4, 5, or 6; R 1 is selected from the group consisting of alkyl, aryl and substituted aryl; R 2 is selected from the group consisting of alkyl, aryl and substituted aryl; and R is selected from the group consisting of hydrogen and alkyl.
Claim 3
Dependent Claim
17 words
An organic electroluminescent device according to claim 1 n which R 1 and R 2 are phenyl.
Claim 4
Dependent Claim
19 words
An organic electroluminescent device according to claim 1 n which R 1 is phenyl and R 2 is naphthyl.
Claim 5
Dependent Claim
17 words
An organic electroluminescent device according to claim 1 n which R 1 and R 2 are naphthyl.
Claim 6
Dependent Claim
18 words
An organic electroluminescent device according to claim 1 n which n=6, R 1 and R 2 are phenyl.
References Cited (Backward Citations)
US2733367A
Cited
US2941104A
Cited
US3180730A
Cited
US3172862A
Cited
US3173050A
Cited
US3658520A
Cited
US3567450A
Cited
US3710167A
Cited
US3935031A
Cited
US4175960A
Cited
US4035686A
Cited
US4356429A
Cited
US4539507A
Cited
US4885211A
Cited
US4720432A
Cited
US4923774A
Cited
US5122711A
Cited
US5104740A
Cited
US5069975A
Cited
US4950950A
Cited
US5073446A
Cited
US5061569A
Cited
US5059861A
Cited
US5059862A
Cited
US5047687A
Cited
US5227945A
Cited
US5256945A
Cited
US5141671A
Cited
US5150006A
Cited
US5151629A
Cited
US5374489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-10 | 2000-03-11 | 2000-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-10 | 2004-03-11 | 2004-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-10 | 2008-03-11 | 2008-09-10 | $7700.00 | Window Closed / Lapsed |