Patent FR763203A successfully refreshed from Google Patents.
Patent US3134899A successfully refreshed from Google Patents.
US3134899A
Expired / Lapsed
US
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Intensity measuring and/or recording devices for corpuscular radiation apparatus, particularly electron microscopes
Assignee: Jenoptik AG
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Filing: 1961-11-13
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Granted: 1964-05-26
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 Guyenot Ernst
- 👤 Hahn Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:27
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/22; H01J37/224; G; G01; G01T; G01T1/00; G01T1/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN ELECTRON MICROSCOPE HAVING A SOURCE OF ELECTRONS, AN ELECTRON-OPTICAL LENS SYSTEM CONSISTING OF AN OBJECTIVE LENS AND AT LEAST A PROJECTION LENS, A PROJECTION SCREEN AND MEANS FOR DIRECTING A BEAM OF ELECTRONS FROM SAID SOURCE TO AN OBJECT AND THROUGH SAID LENS SYSTEM, SAID BEAM PRODUCING A MAGNIFIED IMAGE OF SAID OBJECT ON SAID PROJECTION SCREEN, A FIRST DEFLECTING ELECTRODE BEING DISPOSED IN THE DIRECTION OF SAID BEAM BEHIND SAID OBJECTIVE LENS AND ELECTRICALLY CONNECTED TO SAID PROJECTION SCREEN TO DEFLECT SAID BEAM CORRESPONDING TO THE CHARGE OF SAID PROJECTION SCREEN, A SECOND DEFLECTING ELECTRODE BEING CONNECTED TO AN ADJUSTABLE COMPENSATING CIRCUIT AND WORKING AGAINST THE DEFLECTION OF SAID BEAM BY SAID FIRST DEFLECTING ELECTRODE, THE ADJUSTMENT OF SAID COMPENSATING CIRCUIT BY WHICH THE DEFLECTION OF SAID BEAM BY SAID FIRST DEFLECTING ELECTRODE IS CANCELLED BEING A MEASURE OF THE IMAGE BRIGHTNESS ON SAID PROJECTION SCREEN.
Claim 2
Dependent Claim
148 words
AN ELECTRON MICROSCOPE HAVING A SOURCE OF ELECTRONS, AN ELECTRON-OPTICAL LENS SYSTEM CONSISTING OF AN OBJECTIVE LENS AND AT LEAST A PROJECTION LENS, A PROJECTION SCREEN AND MEANS FOR DIRECTING A BEAM OF ELECTRONS FROM SAID SOURCE TO AN OBJECT AND THROUGH SAID LENS SYSTEM, SAID BEAM PRODUCING A MAGNIFIED IMAGE OF SAID OBJECT ON SAID PROJECTION SCREEN, A FIRST DEFLECTING ELECTRODE BEING DISPOSED IN THE DIRECTION OF SAID BEAM BEHIND SAID OBJECTIVE LENS AND ELECTRICALLY CONNECTED TO SAID PROJECTION SCREEN TO DEFLECT SAID BEAM CORRESPONDING TO THE CHARGE OF SAID PROJECTION SCREEN, A SECOND DEFLECTING ELECTRODE BEING CONNECTED TO AN ADJUSTABLE COMPENSATING CIRCUIT AND WORKING AGAINST THE DEFLECTION OF SAID BEAM BY SAID FIRST DEFLECTING ELECTRODE, THE ADJUSTMENT OF SAID COMPENSATING CIRCUIT BY WHICH THE DEFLECTION OF SAID BEAM BY SAID FIRST DEFLECTING ELECTRODE IS CANCELLED BEING A MEASURE OF THE IMAGE BRIGHTNESS ON SAID PROJECTION SCREEN.
References Cited (Backward Citations)
US2879394A
Cited
US2991361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |