Patent US3213309A successfully refreshed from Google Patents.
US3213309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing tube
Assignee: Unisys Corp
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Filing: 1961-08-14
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Granted: 1965-10-19
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 James A Ogle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:15
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN ELECTRON BEAM TUBE COMPRISING, AN ENVELOPE OF ELECTRICALLY INSULATING MATERIAL, MEANS IN ONE PORTION OF SAID ENVELOPE FOR GENERATING AN ELECTRON BEAM AND DIRECING IT TO A TARGET IN ANOTHER PORTION OF SAID ENVELOPE, A SUBSTANTIALLY FLAT FACEPLATE OF ELECTRICALLY INSULATING MATERIAL BONDED BY ITS INNER SUBSTANTIALLY FLAT FACE TO SAID ENVELOPE AT SAID OTHER PORTION AND SEALING SAID ENVELOPE AGAINST ATMOSPHERE, A THIN SUBSTANTIALLY FLAT ELECTRICALLY CONDUCTIVE TARGET FIRMLY ATTACHED TO THE INNER FACE OF SAID FACEPLATE AND HAVING A PORTION EXTENDING ACROSS SAID FACEPLATE AND THROUGH THE BOND BETWEEN THE ENVELOPE AND FACEPLATE TO TERMINATE ON AN EXTERNAL SUBSTANTIALLY FLAT EXTENSION OF SAID INNER FACE OF SAID FACEPLATE THUS TO FORM AN EXTERNAL ELECTRODE, A BAR ELECTRODE SECURED TO SAID FLAT EXTENSION, AND A FLAT STRIP OF ELECTRICALLY INSULATING MATETRIAL SEPARATING THE BAR ELECTRODE FROM SAID EXTERNAL ELECTRODE.
Claim 2
Dependent Claim
141 words
AN ELECTRON BEAM TUBE COMPRISING, AN ENVELOPE OF ELECTRICALLY INSULATING MATERIAL, MEANS IN ONE PORTION OF SAID ENVELOPE FOR GENERATING AN ELECTRON BEAM AND DIRECING IT TO A TARGET IN ANOTHER PORTION OF SAID ENVELOPE, A SUBSTANTIALLY FLAT FACEPLATE OF ELECTRICALLY INSULATING MATERIAL BONDED BY ITS INNER SUBSTANTIALLY FLAT FACE TO SAID ENVELOPE AT SAID OTHER PORTION AND SEALING SAID ENVELOPE AGAINST ATMOSPHERE, A THIN SUBSTANTIALLY FLAT ELECTRICALLY CONDUCTIVE TARGET FIRMLY ATTACHED TO THE INNER FACE OF SAID FACEPLATE AND HAVING A PORTION EXTENDING ACROSS SAID FACEPLATE AND THROUGH THE BOND BETWEEN THE ENVELOPE AND FACEPLATE TO TERMINATE ON AN EXTERNAL SUBSTANTIALLY FLAT EXTENSION OF SAID INNER FACE OF SAID FACEPLATE THUS TO FORM AN EXTERNAL ELECTRODE, A BAR ELECTRODE SECURED TO SAID FLAT EXTENSION, AND A FLAT STRIP OF ELECTRICALLY INSULATING MATETRIAL SEPARATING THE BAR ELECTRODE FROM SAID EXTERNAL ELECTRODE.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |