Patent US4073989A successfully refreshed from Google Patents.
US4073989A
Expired / Lapsed
US
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Continuous channel electron beam multiplier
Assignee: Horizons Inc
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Filing: 1964-01-17
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Granted: 1978-02-14
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Expires: 1984-01-17
Abstract
Abstract 1. A fully vitrified ceramic element comprising a thin wafer having at least one aperture extending through said wafer, and perpendicular to the major surfaces of said wafer, the composition of said wafer consisting essentially of between 10 and 50 mole percent of at least one oxide selected from the group consisting of the oxides of Cs, Rb, K, Be, Mg, Ca, Ba, Sr, Ce, La, Yt and Zn, and between 90 and 40 mole percent of oxide of a metal selected from the group consisting of titanium, tin and niobium and between 0.5 and 3 mole percent of an oxide forming compound of at least one element selected from the group consisting of Ag, Au, Pd, Mo, W, and Sb.
Inventors
- 👤 Eugene Wainer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:37
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/32; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A fully virified ceramic element comprising a thin wafer having at least one aperture extending through said wafer, and perpendicular to the major surfaces of said wafer, the composition of said wafer consisting essentially of between 10 and 50 mole percent of at least one oxide selected from the group consisting of the oxides of Cs, Rb, K, Be, Mg, Ca, Ba, Sr, Ce, La, Yt and Zn, and between 90 and 40 mole percent of oxide of a metal selected from the group consisting of titanium, tin and niobium and between 0.5 and 3 mole percent of an oxide forming compound of at least one element selected from the group consisting of Ag, Au, Pd, Mo, W, and Sb.
Claim 2
Dependent Claim
120 words
A fully virified ceramic element comprising a thin wafer having at least one aperture extending through said wafer, and perpendicular to the major surfaces of said wafer, the composition of said wafer consisting essentially of between 10 and 50 mole percent of at least one oxide selected from the group consisting of the oxides of Cs, Rb, K, Be, Mg, Ca, Ba, Sr, Ce, La, Yt and Zn, and between 90 and 40 mole percent of oxide of a metal selected from the group consisting of titanium, tin and niobium and between 0.5 and 3 mole percent of an oxide forming compound of at least one element selected from the group consisting of Ag, Au, Pd, Mo, W, and Sb.
Claim 3
Dependent Claim
26 words
The ceramic element of claim 1 wherein the number of apertures is such that they occupy at least 50% of the surface area of said wafer.
Claim 4
Dependent Claim
23 words
The ceramic element of claim 1 wherein the thickness of the wafer is between 50 and 150 times the diameter of said apertures.
Claim 5
Dependent Claim
14 words
The ceramic element of claim 1 as a face plate in an evacuated envelope.
Claim 6
Dependent Claim
22 words
The ceramic element of claim 1 wherein each aperture extending through said wafer is filled with a metal which expands on cooling.
Claim 7
Dependent Claim
15 words
An image intensifier tube in which the plate of claim 5 is the face plate.
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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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |