US4902929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent device containing electroluminescent particles each covered with moisture proof film
Assignee: Murata Manufacturing Co Ltd
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Filing: 1988-05-06
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Granted: 1990-02-20
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Expires: 2008-05-06
Abstract
Abstract An electroluminescent device comprises a luminous layer containing electroluminescent particles each covered with a moisture-proof film, which is formed by polymer, having network structure obtained by hydrolyzing metal alkoxide and causing polycondensation reaction. The moisture-proof film may contain pigment, or a film containing pigment may be formed to cover the electroluminescent particle.
Inventors
- 👤 Masahiro Toyoda
- 👤 Katsuhiko Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:41
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; H; H05; H05B; H05B33/00; H05B33/02; H05B33/04; H05B33/12; H05B33/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
50 words
An electroluminescent device comprising: emitter means containing electroluminescent particles; and means for applying an electric field to said emitter means, each of said electroluminescent particles being covered with a moisture-proof film of an inorganic polymer containing silica having network structure obtained y hydrolyzing metal alkoxide and causing polycondensation reaction polymer.
Claim 2
Dependent Claim
50 words
An electroluminescent device comprising: emitter means containing electroluminescent particles; and means for applying an electric field to said emitter means, each of said electroluminescent particles being covered with a moisture-proof film of an inorganic polymer containing silica having network structure obtained y hydrolyzing metal alkoxide and causing polycondensation reaction polymer.
Claim 3
Dependent Claim
16 words
An electroluminescent device in accordance with claim 1, wherein pigment is dispersed in said moisture-proof film.
Claim 4
Dependent Claim
22 words
An electroluminescent device in accordance with claim 1, wherein said moisture-proof film is formed on the surface of each said electroluminescent particle.
Claim 5
Dependent Claim
27 words
An electroluminescent device in accordance with claim 3, further including a film containing pigment, said film containing pigment being formed on the surface of said moisture-proof film.
Claim 6
Dependent Claim
36 words
An electroluminescent device in accordance with claim 1, further including a film containing pigment formed on the surface of each said electroluminescent particle, said moisture-proof film being formed, on the surface of said film containing pigment.
References Cited (Backward Citations)
US2944177A
Cited
US2951169A
Cited
US3010044A
Cited
US3649383A
Cited
JPS60264095A
Cited
US4717590A
Cited
JPH0428377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |