US3286114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable magnification electron lens
Assignee: General Electric Co
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Filing: 1963-09-16
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Granted: 1966-11-15
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Schlesinger Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:30
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/501; H01J29/00; H01J29/46; H01J29/58; H01J29/62; H01J29/622; H01J29/624
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A VARIABLE MAGNIFICATION ELECTRON LENS COMPRISING (A) A FIRST ELECTROSTATIC LENS UNIT FOR GENERATING A FIRST ELECTRIC FIELD HAVING A SUBSTANTIALLY QUADRATIC POTENTIAL DISTRIBUTION ALONG ITS AXIS, (B) A SECOND ELECTROSTATIC LENS UNIT COAXIAL WITH AND POSITIONED IN TANDEM WITH RESPECT TO SAID FIRST LENS UNIT FOR GENERATING A SECOND ELECTRIC FIELD HAVING A SUBSTANTIALLY QUADRATIC POTENTIAL DISTRIBUTION ALONG SAID AXIS, AND (C) MEANS FOR VARYING THE QUADRATIC POTENTIAL DISTRIBUTION BETWEEN SAID ELECTRIC FIELDS GENERATED BY SAID FIRST AND SAID SECOND ELECTROSTATIC LENS UNITS TO VARY THE MAGNIFICATION OF SAID ELECTRON LENS.
Claim 2
Dependent Claim
92 words
A VARIABLE MAGNIFICATION ELECTRON LENS COMPRISING (A) A FIRST ELECTROSTATIC LENS UNIT FOR GENERATING A FIRST ELECTRIC FIELD HAVING A SUBSTANTIALLY QUADRATIC POTENTIAL DISTRIBUTION ALONG ITS AXIS, (B) A SECOND ELECTROSTATIC LENS UNIT COAXIAL WITH AND POSITIONED IN TANDEM WITH RESPECT TO SAID FIRST LENS UNIT FOR GENERATING A SECOND ELECTRIC FIELD HAVING A SUBSTANTIALLY QUADRATIC POTENTIAL DISTRIBUTION ALONG SAID AXIS, AND (C) MEANS FOR VARYING THE QUADRATIC POTENTIAL DISTRIBUTION BETWEEN SAID ELECTRIC FIELDS GENERATED BY SAID FIRST AND SAID SECOND ELECTROSTATIC LENS UNITS TO VARY THE MAGNIFICATION OF SAID ELECTRON LENS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |