US4302706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-to-glass sealing method with conductive layer
Assignee: Cooper Industries LLC
•
Filing: 1980-01-14
•
Granted: 1981-11-24
•
Expires: 2000-01-14
Abstract
Abstract A glass-to-glass seal with an intervening layer of metal oxide is made using a frit containing a high lead content and a metallic nucleating agent. The metal oxide may optionally be used to provide conductive paths through the seal without embedded metallic conductors.
Inventors
- 👤 Richard DuBois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
H; H01; H01J; H01J63/00; H01J63/02; C; C03; C03C; C03C27/00; C03C27/06; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01J9/00; H01J9/24; H01J9/26; H01J9/261; H01J2329/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
A method of sequentially multiplexing the glow of a plurality of characters in a multicharacter vacuum fluorescent display device of the type having anodes on a substrate, a filament and a glass cover plate sealed by a seal to said substrate forming between them a sealed enclosure, comprising the steps of: (a) placing independently energizeable, transparent, conductive layers on said glass cover plate, at least a portion of each respectively facing each of said characters, said layers being on the opposite side of said filament from said anodes; (b) extinguishing the glow on all but a first of said characters by placing a positive voltage on the said conductive layers facing all the other characters; (c) energizing said first character by placing a voltage on the conductive layer facing it that is less positive than said positive voltage; (d) continuously sequencing through the energization of each of said characters; and (e) completing one sequence through the energization of said characters in less than 100 milliseconds.
Claim 2
Independent Claim
165 words
A method of sequentially multiplexing the glow of a plurality of characters in a multicharacter vacuum fluorescent display device of the type having anodes on a substrate, a filament and a glass cover plate sealed by a seal to said substrate forming between them a sealed enclosure, comprising the steps of: (a) placing independently energizeable, transparent, conductive layers on said glass cover plate, at least a portion of each respectively facing each of said characters, said layers being on the opposite side of said filament from said anodes; (b) extinguishing the glow on all but a first of said characters by placing a positive voltage on the said conductive layers facing all the other characters; (c) energizing said first character by placing a voltage on the conductive layer facing it that is less positive than said positive voltage; (d) continuously sequencing through the energization of each of said characters; and (e) completing one sequence through the energization of said characters in less than 100 milliseconds.
Claim 3
Dependent Claim
21 words
The method recited in claim 1 wherein said layers are oxides selected from the group consisting of tin, indium and antimony.
Claim 4
Dependent Claim
56 words
The method recited in claim 1 further comprising the steps of: (a) coating said layers on the inside of said cover plate within said sealed enclosure; (b) continuing said coating through the seal between the inside and the outside of said sealed enclosure; and (c) independently contacting said coating with control signals outside said sealed enclosure.
References Cited (Backward Citations)
US3668466A
Cited
US3584252A
Cited
US3837724A
Cited
US4113896A
Cited
US4004186A
Cited
US4122376A
Cited
US4132920A
Cited
US4216470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |