US3087057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for varying the picture brightness in an electron microscope
Assignee: Carl Zeiss AG
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Filing: 1959-11-30
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Granted: 1963-04-23
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Expires: 1979-11-30
Abstract
No abstract record available.
Inventors
- 👤 Gutter Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:11
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/26; H01J37/261; H01J37/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN ELECTRON MICROSCOPE HAVING A BEAM GENERATING SYSTEM INCLUDING AN ANODE, COMPRISING A DIAPHRAGM HAVING A BEAM DEFINING APERTURE THEREIN, SAID DIAPHRAGM POSITIONED BETWEEN THE ANODE AND THE OBJECT TO BE IMAGED, AND MEANS FOR CYCLICALLY SWEEPING THE ELECTRON BEAM ACROSS SAID APERTURE IN A SYMMETRICAL DEFLECTION PATTERN, SAID LAST NAMED MEANS COMPRISING MEANS FOR GENERATING AN ALTERNATING DEFLECTION FIELD AND MEANS FOR VARYING THE AMPLITUDE OF SAID FIELD.
Claim 2
Dependent Claim
69 words
AN ELECTRON MICROSCOPE HAVING A BEAM GENERATING SYSTEM INCLUDING AN ANODE, COMPRISING A DIAPHRAGM HAVING A BEAM DEFINING APERTURE THEREIN, SAID DIAPHRAGM POSITIONED BETWEEN THE ANODE AND THE OBJECT TO BE IMAGED, AND MEANS FOR CYCLICALLY SWEEPING THE ELECTRON BEAM ACROSS SAID APERTURE IN A SYMMETRICAL DEFLECTION PATTERN, SAID LAST NAMED MEANS COMPRISING MEANS FOR GENERATING AN ALTERNATING DEFLECTION FIELD AND MEANS FOR VARYING THE AMPLITUDE OF SAID FIELD.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |