US4599076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing discharge display device
Assignee: Sony Corp
•
Filing: 1985-04-11
•
Granted: 1986-07-08
•
Expires: 2005-04-11
Abstract
Abstract The present invention discloses a method of producing a discharge display device which enables a LaB 6 cathode to be formed by a thick-film printing method. The method of the present invention comprises the steps of applying a paste prepared by mixing LaB 6 powder with alkali glass powder in a proportion of 20-40 wt. % with respect to the LaB 6 powder to a base electrode, burning the paste, and activating the paste by gas discharge with large current after an exhaustion step to form a LaB 6 cathode on the base electrode.
Inventors
- 👤 Shigeru Yokono
- 👤 Masatoshi Takahashi
- 👤 Hideo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
H; H01; H01J; H01J11/00; H01J11/20; H01J11/22; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/063; H01J11/32; H01J9/00; H01J9/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A method of producing a discharge display device comprising the steps of applying a paste prepared by mixing LaB 6 powder with alkali glass powder in a proportion of 20-40 wt. % of glass powder with respect to the LaB 6 powder, to a base electrode, burning the paste, and activating the paste by gas discharge with large current following an exhaustion step to form a LaB 6 cathode on said base electrode.
Claim 2
Independent Claim
73 words
A method of producing a discharge display device comprising the steps of applying a paste prepared by mixing LaB 6 powder with alkali glass powder in a proportion of 20-40 wt. % of glass powder with respect to the LaB 6 powder, to a base electrode, burning the paste, and activating the paste by gas discharge with large current following an exhaustion step to form a LaB 6 cathode on said base electrode.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein the paste is formed in dry air at a temperature of about 500°-600° C. for a period of about 30 minutes.
Claim 4
Dependent Claim
21 words
The method set forth in claim 1 wherein said large current is in the range of 2-5 amps per square centimeters.
References Cited (Backward Citations)
US2172207A
Cited
US4126809A
Cited
US4429250A
Cited
US4393326A
Cited
US4317750A
Cited
US4554482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |