US3189781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image tube utilizing transmissive dynode-type target
Assignee: Westinghouse Electric Corp
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Filing: 1962-01-19
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Granted: 1965-06-15
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Expires: 1982-01-19
Abstract
No abstract record available.
Inventors
- 👤 Lempert Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:54
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/41; H01J29/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN ELECTRON DISCHARGE DEVICE COMPRISING A TARGET ELECTRODE INCLUDING A FILM OF INSULATING MATERIAL HAVING THE PROPERTY OF EMITTING SECONDARY ELECTRONS FROM A FIRST SURFACE IN RESPONSE TO ELECTRON BOMBARDMENT OF A SECOND SURFACE, SAID FIRST AND SECOND SURFACES BEING EXPOSED OVER THEIR ACTIVE AREAS, MEANS FOR DIRECTING A WRITING ELECTRON BEAM HAVING ELECTRONS OF A PREDETERMINED ENERGY AT SAID SECOND SURFACE OF SAID INSULATING FILM TO ESTABLISH AT SAID FIRST SURFACE A POSITIVE CHARGE PATTERN DURE TO EMISSION OF SECONDARY ELECTRONS FROM SAID FIRST SURFACE FROM AN EQUILIBRIUM CHARGE CORRESPONDING TO SAID WRITING BEAM, MEANS FOR DIRECTING ELECTRONS BELOW SAID PREDETERMINED ENERGY AT SAID FIRST SURFACE OF SAID FILM TO RESTORE SAID FIRST SURFACE TO SAID EQUILIBRIUM CHARGE
Claim 2
Dependent Claim
119 words
AN ELECTRON DISCHARGE DEVICE COMPRISING A TARGET ELECTRODE INCLUDING A FILM OF INSULATING MATERIAL HAVING THE PROPERTY OF EMITTING SECONDARY ELECTRONS FROM A FIRST SURFACE IN RESPONSE TO ELECTRON BOMBARDMENT OF A SECOND SURFACE, SAID FIRST AND SECOND SURFACES BEING EXPOSED OVER THEIR ACTIVE AREAS, MEANS FOR DIRECTING A WRITING ELECTRON BEAM HAVING ELECTRONS OF A PREDETERMINED ENERGY AT SAID SECOND SURFACE OF SAID INSULATING FILM TO ESTABLISH AT SAID FIRST SURFACE A POSITIVE CHARGE PATTERN DURE TO EMISSION OF SECONDARY ELECTRONS FROM SAID FIRST SURFACE FROM AN EQUILIBRIUM CHARGE CORRESPONDING TO SAID WRITING BEAM, MEANS FOR DIRECTING ELECTRONS BELOW SAID PREDETERMINED ENERGY AT SAID FIRST SURFACE OF SAID FILM TO RESTORE SAID FIRST SURFACE TO SAID EQUILIBRIUM CHARGE
References Cited (Backward Citations)
US2544754A
Cited
US2898499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |