US3371206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam apparatus having compensating means for triangular beam distortion
Assignee: Jeol Ltd
•
Filing: 1965-02-02
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Granted: 1968-02-27
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Takizawa Tadao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:47
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/153; B; B23; B23K; B23K15/00; B23K15/0013; H01J37/147; H01J37/1472; H01J37/1474; H01J37/1475
Claims Analysis
Total Claims: 0
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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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |