Patent US3558975A successfully refreshed from Google Patents.
US3558975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-filled matrix display devices
Assignee: Unisys Corp
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Filing: 1968-02-07
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Granted: 1971-01-26
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Expires: 1988-02-07
Abstract
Abstract D R A W I N G The disclosure is of a multiple gas cell display panel which includes a sandwich of a central apertured plate and top and bottom cover plates, all of glass. The central plate includes apertures arranged in rows and columns which comprise the lightproducing cells of the display. The top and bottom plates are of glass and are rigid and the central plate is formed from a flexible strip of powdered glass which is cut to size, has the holes formed in it, and is then sealed in place between the top and bottom plates.
Inventors
- 👤 James A Ogle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:20
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
The method of making a display panel comprising the steps of: providing a flexible sheet of a thin layer of powdered glass secured to a carrier of a synthetic resinous material; pressing a plurality of rods into adherent contact with areas of said sheet, removing said rods and thereby removing said areas of said sheet contacted by said rods to leave holes in said sheet; sealing said sheet between a pair of glass plates; and filling said holes in said sheet with an ionizable lightproducing gas to produce gas-filled cells.
Claim 2
Independent Claim
90 words
The method of making a display panel comprising the steps of: providing a flexible sheet of a thin layer of powdered glass secured to a carrier of a synthetic resinous material; pressing a plurality of rods into adherent contact with areas of said sheet, removing said rods and thereby removing said areas of said sheet contacted by said rods to leave holes in said sheet; sealing said sheet between a pair of glass plates; and filling said holes in said sheet with an ionizable lightproducing gas to produce gas-filled cells.
Claim 3
Dependent Claim
25 words
The method defined in claim 1 and including, before the step of sealing, the step of heating said sheet to remove vaporizable binders and adhesives.
Claim 4
Dependent Claim
41 words
The method defined in claim 1 and including the steps of disposing a first array of electrodes between said sheet and one of said glass plates and disposing a second array of electrodes between said sheet and said other glass plate.
Claim 5
Dependent Claim
57 words
The method defined in claim 1 and including the steps of disposing a first array of electrodes between said sheet and one of said glass plates and disposing a second array of electrodes between said sheet and said other glass plate, said first and second arrays of electrodes being disposed at 90* with respect to each other.
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |