US4417174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent cell and method of producing the same
Assignee: Alps Alpine Co Ltd
•
Filing: 1981-10-02
•
Granted: 1983-11-22
•
Expires: 2001-10-02
Abstract
Abstract At least either of a luminescent layer and an insulating layer in an electroluminescent cell is made of the copolymer between vinylidene fluoride and propylene hexafluoride. In producing the electroluminescent cell, the luminescent layer is formed by applying a phosphorescent paste on a transparent electrode and heat-treating it, and the insulating layer is formed by applying an insulating paste on the luminescent layer and heat-treating it.
Inventors
- 👤 Yoshimi Kamijo
- 👤 Kazuhiko Kawachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; H05B33/20; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
In an electroluminescent cell wherein a luminescent layer and an insulating layer lie between a transparent electrode and a counter electrode; an electroluminescent cell characterized in that said luminescent layer is made of a copolymer of vinylidene fluoride and propylene hexafluoride with phosphorescent powder dispersed therein.
Claim 2
Dependent Claim
46 words
In an electroluminescent cell wherein a luminescent layer and an insulating layer lie between a transparent electrode and a counter electrode; an electroluminescent cell characterized in that said luminescent layer is made of a copolymer of vinylidene fluoride and propylene hexafluoride with phosphorescent powder dispersed therein.
Claim 3
Dependent Claim
30 words
An electroluminescent cell according to claim 1, wherein said insulating layer is made of a copolymer of vinylidene fluoride and propylene hexafluoride with a high-permittivity powder dispersed and contained therein.
Claim 4
Dependent Claim
47 words
In an electroluminescent cell wherein a luminescent layer and an insulating layer lie between a transparent electrode and a counter electrode; an electroluminescent cell characterized in that said insulating layer is made of a copolymer of vinylidene fluoride and propylene hexafluoride with a high-permittivity powder dispersed therein.
Claim 5
Dependent Claim
47 words
In an electroluminescent cell wherein a luminescent layer and an insulating layer lie between a transparent electrode and a counter electrode; an electroluminescent cell characterized in that said insulating layer is made of a copolymer of vinylidene fluoride and propylene hexafluoride with a high-permittivity powder dispersed therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |