Patent US4600397A successfully refreshed from Google Patents.
US4600397A
Expired / Lapsed
US
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Method of producing discharge display device
Assignee: Sony Corp
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Filing: 1985-04-11
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Granted: 1986-07-15
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Expires: 2005-04-11
Abstract
Abstract The present invention discloses a method of producing a discharge display device which enables formation of a satisfactory LaB 6 cathode without using a LaB 6 paste containing a glass binder. The method of the present invention comprises the steps of applying a conductive paste containing a glass binder, temporarily drying said conductive paste to form a conductive paste layer, forming a LaB 6 layer containing no glass binder on said conductive paste layer, burning said conductive paste layer and said LaB 6 layer, at the same time, and activating said LaB 6 layer after being burnt, and after an exhausting step by gas discharge with large current to form a LaB 6 cathode.
Inventors
- 👤 Osamu Kawakubo
- 👤 Eiji Munemoto
- 👤 Akihiko Okubora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:15
CPC Classifications
H; H01; H01J; H01J11/00; H01J11/20; H01J11/22; H01J9/00; H01J9/02; H01J11/32; H01J17/00; H01J17/02; H01J17/04; H01J17/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
A method of producing a discharge display device comprising the steps of applying to a dielectric substrate a conductive paste containing a glass binder, temporarily drying said conductive paste layer, forming a LaB 6 layer containing no glass binder on said conductive paste layer, burning said conductive paste layer and said LaB 6 layer at the same time, and activating said LaB 6 layer after being burnt by gas discharge with large current after an exhaustion step to form a LaB 6 cathode.
Claim 2
Independent Claim
83 words
A method of producing a discharge display device comprising the steps of applying to a dielectric substrate a conductive paste containing a glass binder, temporarily drying said conductive paste layer, forming a LaB 6 layer containing no glass binder on said conductive paste layer, burning said conductive paste layer and said LaB 6 layer at the same time, and activating said LaB 6 layer after being burnt by gas discharge with large current after an exhaustion step to form a LaB 6 cathode.
Claim 3
Dependent Claim
14 words
The method set forth in claim 1 wherein said LaB 6 layer is electrodeposited.
Claim 4
Dependent Claim
25 words
The method set forth in claim 1 wherein said LaB 6 layer is a paste layer deposited on said conductive paste by thick film printing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |