US4851734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat fluorescent lamp having transparent electrodes
Assignee: Hamai Electric Lamp Co Ltd
•
Filing: 1987-11-20
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Granted: 1989-07-25
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Expires: 2007-11-20
Abstract
Abstract A flat fluorescent lamp having transparent electrodes, transparent glass plates spaced vertically apart and confronting each other, transparent conductive films forming electrodes provided on the outer surface or the inner surface of the glass plates, fluorescent paint layers provided fixedly on the inner side of the glass plates, or on the glass plates via the transparent conductive films by coating the fluorescent paint on the inner surfaces of the glass plates or conductive films, glass frames spaced horizontally close to both ends of the transparent glass plates or the transparent conductive films and fixedly mounted on the glass plates or transparent conductive films, a space surounded by the glass plates or the transparent conductive films and the glass frames for sealing gas, generally an inert gas therein, and lead-in wires clamping one end of the glass plates and the transparent conductive films.
Inventors
- 👤 Jitsuo Hamai
- 👤 Hiroyuki Hamai
- 👤 Eiichi Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:21
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; H01J61/04; H01J61/38; H01J61/42; H01J61/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
A flat fluorescent lamp having transparent electrodes comprising: a pair of transparent glass plates spaced vertically apart and having inner planar surfaces positioned in parallel and face-to-face relationship; a first transparent conductive film forming an electrode provided on and covering the inner planar surface of one of the transparent glass plates; a second transparent conductive film forming an electrode provided on and covering the inner planar surface of the other transparent glass plate; a glass frame positioned and fixedly mounted between said pair of transparent glass plates, said glass frame and first and second transparent conductive films forming a sealed chamber defining a space therein for containing a gas; fluorescent paint layers provided on the surfaces of said first and second transparent conductive films that are contained within said sealed chamber; and lead-in wires clamping one end of the glass plates and the transparent conductive film.
Claim 2
Dependent Claim
146 words
A flat fluorescent lamp having transparent electrodes comprising: a pair of transparent glass plates spaced vertically apart and having inner planar surfaces positioned in parallel and face-to-face relationship; a first transparent conductive film forming an electrode provided on and covering the inner planar surface of one of the transparent glass plates; a second transparent conductive film forming an electrode provided on and covering the inner planar surface of the other transparent glass plate; a glass frame positioned and fixedly mounted between said pair of transparent glass plates, said glass frame and first and second transparent conductive films forming a sealed chamber defining a space therein for containing a gas; fluorescent paint layers provided on the surfaces of said first and second transparent conductive films that are contained within said sealed chamber; and lead-in wires clamping one end of the glass plates and the transparent conductive film.
Claim 3
Dependent Claim
27 words
A flat fluorescent lamp having transparent electrodes according to claim 1, wherein inert gas is contained in said space in an amount to effect glow discharge therein.
Claim 4
Dependent Claim
18 words
A flat fluorescent lamp having transparent electrodes according to claim 1, wherein said paint has three spectral colours.
Claim 5
Dependent Claim
31 words
A flat fluorescent lamp having transparent electrodes according to claim 1 wherein said conductive films are spaced apart in vertical face-to-face relationship with each other at a distance of several millimeters.
Claim 6
Dependent Claim
186 words
A flat fluorescent lamp having transparent electrodes comprising: a pair of transparent glass plates spaced vertically apart, each of said transparent glass plates having planar inner and outer surfaces which are parallel to each other, said planar inner surfaces of said transparent glass plates being positioned in parallel and face-to-face relationship; a first transparent conductive film forming an electrode provided on and covering the inner planar surface of one of the transparent glass plates; a second transparent conductive film forming an electrode provided on and covering the outer planar surface of the other transparent glass plate; a glass frame positioned and fixedly mounted between said pair of transparent glass plates, said glass frame, said first transparent conductive film and said inner planar surface of said other transparent glass plate forming a sealed chamber defining a space therein for containing a gas; fluorescent paint layers provided on the surfaces of said transparent conductive film and said inner planar surface of said other transparent glass plate that are contained within said sealed container; and lead-in wires clamping one end of the glass plates and the transparent conductive films.
Claim 7
Dependent Claim
186 words
A flat fluorescent lamp having transparent electrodes comprising: a pair of transparent glass plates spaced vertically apart, each of said transparent glass plates having planar inner and outer surfaces which are parallel to each other, said planar inner surfaces of said transparent glass plates being positioned in parallel and face-to-face relationship; a first transparent conductive film forming an electrode provided on and covering the inner planar surface of one of the transparent glass plates; a second transparent conductive film forming an electrode provided on and covering the outer planar surface of the other transparent glass plate; a glass frame positioned and fixedly mounted between said pair of transparent glass plates, said glass frame, said first transparent conductive film and said inner planar surface of said other transparent glass plate forming a sealed chamber defining a space therein for containing a gas; fluorescent paint layers provided on the surfaces of said transparent conductive film and said inner planar surface of said other transparent glass plate that are contained within said sealed container; and lead-in wires clamping one end of the glass plates and the transparent conductive films.
Claim 8
Dependent Claim
27 words
A flat fluorescent lamp having transparent electrodes according to claim 5, wherein inert gas is contained in said space in an amount to effect glow discharge therein.
Claim 9
Dependent Claim
18 words
A flat fluorescent lamp having transparent electrodes according to claim 5, wherein said paint has three spectral colours.
Claim 10
Dependent Claim
31 words
A flat fluorescent lamp having transparent electrodes according to claim 5, wherein said conductive films are spaced apart in vertical face-to-face relationship with each other at a distance of several millimeters.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |