Patent US3171933A successfully refreshed from Google Patents.
Patent US4039877A successfully refreshed from Google Patents.
US4039877A
Expired / Lapsed
US
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Image intensifier with fiber optic faceplates sealed with indium-bismuth alloy
Assignee: International Telephone and Telegraph Corp
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Filing: 1976-06-24
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Granted: 1977-08-02
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Expires: 1996-06-24
Abstract
Abstract Methods and apparatus are provided for efficiently processing vacuum tubes containing microchannel plate electron multipliers. The vacuum tube body containing the microchannel plate is thermally treated under vacuum prior to sealing the tube faceplates by means of reversible melted metal seals.
Inventors
- 👤 Jack D. Wimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:35
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/505; H01J5/00; H01J5/20; H01J5/22; H01J5/28; H01J9/00; H01J9/24; H01J9/26; H01J9/263
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
An image intensifier tube comprising: an open-ended tube body: a microchannel plate electron multiplier within said tube body; a fiber optic faceplate containing a layer of phosphor material sealed to one end of said tube body by means of an alloy of indium and bismuth; and a fiber optic faceplate having a layer of photocathode material sealed to another end of said tube body by means of an alloy of indium and bismuth.
Claim 2
Dependent Claim
73 words
An image intensifier tube comprising: an open-ended tube body: a microchannel plate electron multiplier within said tube body; a fiber optic faceplate containing a layer of phosphor material sealed to one end of said tube body by means of an alloy of indium and bismuth; and a fiber optic faceplate having a layer of photocathode material sealed to another end of said tube body by means of an alloy of indium and bismuth.
Claim 3
Dependent Claim
39 words
The image intensifier tube of claim 1 wherein both said fiber optic faceplate coated with phosphor and said fiber optic faceplate coated with said photocathode material are sealed by means of said indium-bismuth alloy in the absence of air.
References Cited (Backward Citations)
US3712986A
Cited
US3634690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |