US3534219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cascaded electron optical system
Assignee: General Electric Co
•
Filing: 1969-01-03
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Granted: 1970-10-13
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Expires: 1989-01-03
Abstract
No abstract record available.
Inventors
- 👤 Sterling P Newberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:05
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; G; G11; G11C; G11C11/00; G11C11/21; G11C11/23; G11C13/00; G11C13/04; H; H01; H01J; H01J29/00; H01J29/46; H01J29/80; H01J29/803; H01J29/806; H01J31/00; H01J31/08; H01J31/58
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) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |