US2929948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic lens
Assignee: Telefunken AG
•
Filing: 1954-05-17
•
Granted: 1960-03-22
•
Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 Gundert Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/62; H01J29/622; H01J29/624
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2223908A
Cited
US2229766A
Cited
US2245581A
Cited
US2424965A
Cited
US2490308A
Cited
US2476060A
Cited
US2567893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |