US3814970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge display panels
Assignee: Thales SA
•
Filing: 1973-04-13
•
Granted: 1974-06-04
•
Expires: 1993-04-13
Abstract
Abstract Gas discharge display panels presenting improved electrical characteristics due to the presence, upon the surfaces in contact with the gas being ionised, of a metal oxide whose electronic configuration incorporates an unsaturated f electron-shell for example thorium oxide or gadolinium oxide.
Inventors
- 👤 J Reboul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:07
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
A display panel as claimed in claim 1, wherein said film is a film of thorium oxide or gadolinium oxide.
Claim 2
Dependent Claim
37 words
A display panel as claimed in claim 2, wherein said oxide film is a thin film deposited upon a film of a dielectric material such as an enamel, itself deposited upon said opposite faces of said slabs.
Claim 3
Dependent Claim
28 words
A display panel as claimed in claim 1, wherein said film is a film of a dielectric material comprising a small quantity of thorium oxide or gadolinium oxide.
References Cited (Backward Citations)
US3634719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |