US3521056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable specimen stage for electron beam apparatus employing adjusting levers arranged to minimize beam defocussing resulting from thermal expansion of stage components
Assignee: Jeol Ltd
•
Filing: 1968-01-29
•
Granted: 1970-07-21
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Expires: 1988-01-29
Abstract
No abstract record available.
Inventors
- 👤 Shigeru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:09
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24; G02B21/26; H; H01; H01J; H01J37/00; H01J37/02; H01J37/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2858444A
Cited
US3191028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |