Patent US3278679A successfully refreshed from Google Patents.
US3278679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron-optical readout of latent electrostatic image
Assignee: General Electric Co
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Filing: 1963-06-13
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Granted: 1966-10-11
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Expires: 1983-06-13
Abstract
No abstract record available.
Inventors
- 👤 Sterling P Newberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:30
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/04; G11C13/048; H; H01; H01J; H01J37/00; H01J37/26; H01J37/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE METHOD OF READING OUT INFORMATION STORED ON A SURFACE IN THE FORM OF LATENT ELECTROSTATIC IMAGE BY MEANS OF AN ELECTRON MIRROR MICROSCOPE WHICH METHOD COMPRISES CONNECTING THE SURFACE HAVING THE LATENT ELECTROSTATIC IMAGE STORED THEREON AS THE ANTICATHODE OF THE ELECTRON-MIRROR MICROSCOPE, SCANNING THE SURFACE WITH A FINELY FOCUSSED ELECTRON BEAM IN TIME SEQUENCE IN ACCORDANCE WITH A PREDETERMINED PATTERN, THE FINELY FOCUSSED ELECTRON BEAM BEING ACCELERATED TO A VOLTAGE VALUE SUCH THAT MIRROR ACTION OCCURS PRIOR TO THE ELECTRONS OF THE BEAM STRIKING THE ANTICATHODE SURFACE, THE REFLECTED ELECTRONS BEING REPRESENTATIVE OF THE POTENTIAL VARIATIONS AT THE TURN AROUND POINTS OF THE TIME SEQUENTIAL SCANNING ELECTRON BEAM, FOCUSSING THE REFLECTED ELECTRONS, AND DERIVING A TIME VARYING OUTPUT ELECTRIC SIGNAL FROM THE REFLECTED ELECTRONS REPRESENTATIVE OF THE VARIATIONS IN THE LATENT ELECTROSTATIC IMAGE.
Claim 2
Independent Claim
135 words
THE METHOD OF READING OUT INFORMATION STORED ON A SURFACE IN THE FORM OF LATENT ELECTROSTATIC IMAGE BY MEANS OF AN ELECTRON MIRROR MICROSCOPE WHICH METHOD COMPRISES CONNECTING THE SURFACE HAVING THE LATENT ELECTROSTATIC IMAGE STORED THEREON AS THE ANTICATHODE OF THE ELECTRON-MIRROR MICROSCOPE, SCANNING THE SURFACE WITH A FINELY FOCUSSED ELECTRON BEAM IN TIME SEQUENCE IN ACCORDANCE WITH A PREDETERMINED PATTERN, THE FINELY FOCUSSED ELECTRON BEAM BEING ACCELERATED TO A VOLTAGE VALUE SUCH THAT MIRROR ACTION OCCURS PRIOR TO THE ELECTRONS OF THE BEAM STRIKING THE ANTICATHODE SURFACE, THE REFLECTED ELECTRONS BEING REPRESENTATIVE OF THE POTENTIAL VARIATIONS AT THE TURN AROUND POINTS OF THE TIME SEQUENTIAL SCANNING ELECTRON BEAM, FOCUSSING THE REFLECTED ELECTRONS, AND DERIVING A TIME VARYING OUTPUT ELECTRIC SIGNAL FROM THE REFLECTED ELECTRONS REPRESENTATIVE OF THE VARIATIONS IN THE LATENT ELECTROSTATIC IMAGE.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |